Bird

(https://sparkpost.com) 📸 Data Snapshot: June 19, 2026

Semantic Coherence — The Lens

Pull the main entities out of the H1, then check whether they actually recur through the body. A page that announces one thing and then talks about another drifts. Headings with no real sentences underneath read as pseudo-substance.

Pillar: Semantic Coherence Analysis Diagnosis: Semantic Drift Check

Semantic Coherence Homepage promise vs. Sub-page reality.

18 Impact Weight: 20 / 100

90% Reputation

Minor drift is detected between the ‘Bird’ branding on the homepage and the ‘SparkPost’ branding found in the documentation (Slot 2). While the H1 ‘Messaging infrastructure for developers’ is consistently supported by the sub-pages, the identity transition from SparkPost to Bird creates a slight navigational disconnect for users seeking documentation on the new API structure vs legacy systems.

Semantic Coherence is read from the heading hierarchy first: what each page announces in its H1 and headings, then whether the body actually delivers on it. Below is the structure the engine mapped, followed by the clean text to check for drift between promise and reality.

🏗️ Semantic Structure — heading hierarchy & page identity (the promise the page makes)

HOMEPAGE Bird · Messaging infrastructure for developers — Bird (https://sparkpost.com)

Title

Bird · Messaging infrastructure for developers — Bird

Meta

Bird is the omnichannel platform for customer messaging, marketing, and CRM — email, SMS, voice, and WhatsApp on one API, built for developers and scale.

H1 Messaging infrastructure for developers.

H2 Drop it in.

H2 Same shape, every stack.

H2 Send Email. HTML and plain text, React Email soon. Delivered on the network the ISPs already trust.

H2 Send SMS. Tier-1 carriers, 190+ countries, with the compliance overhead handled for you.

H2 Use Voice. Programmable voice, on PSTN and SIP, with TTS that doesn't sound robotic.

H2 Send WhatsApp. Official Cloud API. Templates, interactive buttons, and media — on the channel three billion people already use.

H2 We are a team of engineers who love building tools for other engineers.

H2 Five products.

H2 One shared layer.

H2 Your messages, actually arriving.

H2 Start with one channel.Add the others when you're ready.

NAV_HEADING_REPEATED_BODY Bird · Messaging infrastructure for developers — Bird (https://sparkpost.com/dashboard/signup/)

Title

Bird · Messaging infrastructure for developers — Bird

Meta

Bird is the omnichannel platform for customer messaging, marketing, and CRM — email, SMS, voice, and WhatsApp on one API, built for developers and scale.

H1 Messaging infrastructure for developers.

H2 Drop it in.

H2 Same shape, every stack.

H2 Send Email. HTML and plain text, React Email soon. Delivered on the network the ISPs already trust.

H2 Send SMS. Tier-1 carriers, 190+ countries, with the compliance overhead handled for you.

H2 Use Voice. Programmable voice, on PSTN and SIP, with TTS that doesn't sound robotic.

H2 Send WhatsApp. Official Cloud API. Templates, interactive buttons, and media — on the channel three billion people already use.

H2 We are a team of engineers who love building tools for other engineers.

H2 Five products.

H2 One shared layer.

H2 Your messages, actually arriving.

H2 Start with one channel.Add the others when you're ready.

NAV_HEADING_REPEATED_BODY_FOOTER Support Documentation – SparkPost (https://sparkpost.com/en-us/docs/)

Title

Support Documentation – SparkPost

Meta

SparkPost Support Documentation

H1 Help & API

NAV_HEADING_REPEATED_BODY_FOOTER Bird · Messaging infrastructure for developers — Bird (https://sparkpost.com/en-us/products/email/)

Title

Bird · Messaging infrastructure for developers — Bird

Meta

Bird is the omnichannel platform for customer messaging, marketing, and CRM — email, SMS, voice, and WhatsApp on one API, built for developers and scale.

H1 Messaging infrastructure for developers.

H2 Drop it in.

H2 Same shape, every stack.

H2 Send Email. HTML and plain text, React Email soon. Delivered on the network the ISPs already trust.

H2 Send SMS. Tier-1 carriers, 190+ countries, with the compliance overhead handled for you.

H2 Use Voice. Programmable voice, on PSTN and SIP, with TTS that doesn't sound robotic.

H2 Send WhatsApp. Official Cloud API. Templates, interactive buttons, and media — on the channel three billion people already use.

H2 We are a team of engineers who love building tools for other engineers.

H2 Five products.

H2 One shared layer.

H2 Your messages, actually arriving.

H2 Start with one channel.Add the others when you're ready.

📝 The Narrative — clean text per page (homepage promise vs. sub-page reality)

HOMEPAGE (https://sparkpost.com) Bird · Messaging infrastructure for developers — Bird

[H1] Messaging infrastructure
for developers.
A developer API for email, SMS, voice, and WhatsApp.Running on the network that already carries 40% of the world's commercial messages.Get startedRead docsUsing Claude Code, Cursor, or Codex? Copy a setup prompt and your agent installs the Bird CLI and skills for you. Pick yours:Claude CodeCopied!CodexCopied!CursorCopied!Trusted every day by teams that build world-class softwareRead more customer stories
[H2] Drop it in.
[H2] Same shape, every stack.
SDKs in every major runtime. REST when you need it and SMTP coming soon. MCP for the agent on your shoulder.Node.jsPythonJava.NETPHPGoRustRubyElixirServerlessRESTSMTPCLIExpressNext.jsNestJSFastifyNuxtHonoBunAstroKoaRemix123456789101112131415161718import express from 'express';
import { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
const app = express();
app.use(express.json());
app.post('/welcome', async (req, res) => {
await bird.email.send({
from: 'onboarding@bird.dev',
to: [req.body.email],
subject: 'Welcome to Bird',
html: '<p>You are in.</p>',
});
res.json({ sent: true });
});
Copy Code01 Direct sending IPs / React Email rendering (Soon) / Managed warm-up
[H2] Send Email. HTML and plain text, React Email soon. Delivered on the network the ISPs already trust.
Read Email DocsDirect sending IPs, managed warm-up, ISP-aware routing, SPF/DKIM/DMARC handled. Templates render in HTML and plain text; React Email coming soon.email.tsx200 · 1.2simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.email.send({
from: 'onboarding@bird.dev',
subject: 'Hello from Bird',
html: '<p>Your first email is <strong>live</strong>.</p>',
});Your invite is readyWelcome aboard, Ada.You can sign in any time at bird.com/login.Your test API key is on your dashboard, ready to send.Copy codeCopiedCopy as promptCopiedView on GithubPer-ISP delivery breakdownPer-message audit log02 A2P 10DLC / Tier-1 carriers / voice OTP fallbackSMS is being upgraded
[H2] Send SMS. Tier-1 carriers, 190+ countries, with the compliance overhead handled for you.
A2P 10DLC, alpha sender IDs, DLT entity registration — we file what you have to file. Smart routing per destination. Voice OTP fallback when SMS degrades. A 6-digit code lands in under three seconds on the lines that matter.sms.ts200 · 0.4simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.sms.send({
from: 'Bird',
to: '+14155550182',
text: 'Your Bird code is 482917.',
});Today at 2:14 PMHey Ada — your Bird sign-in code is 482917. It'll expire in 10 minutes. Don't share it with anyone.482917DeliveredNew API soon - Sign up to get notified10DLC application + brand vetting in 48hRoute diversity per destinationVoice OTP fallback (opt-in per account)Segment-accurate pricing in the response03 PSTN + SIP / streaming TTS / declarative flowsVoice is being upgraded
[H2] Use Voice. Programmable voice, on PSTN and SIP, with TTS that doesn't sound robotic.
Outbound and inbound. Declarative flow JSON for IVR. Recording and live transcription. Streaming TTS in thirty languages with sub-250 ms first-byte audio — the model loads before the call connects.voice.ts201 · 0.4simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.calls.create({
from: '+14155550100',
to: '+14155550182',
flow: [{ say: 'Your verification code is four, eight, two...' }],
});Bird Verify+1 (415) 555-0182Yourverificationcodeisfoureighttwonineoneseven.New API soon - Sign up to get notifiedStreaming TTS in 30+ languagesDeclarative flows: say, gather, dial, transferRecording + live transcript over WebSocketPSTN + SIP termination, BYOC supported04 Cloud API / template messages / interactive repliesWhatsApp is being upgraded
[H2] Send WhatsApp. Official Cloud API. Templates, interactive buttons, and media — on the channel three billion people already use.
Pre-approved templates, session messaging, and interactive replies. Delivery and read receipts on every message. One number, every conversation — with the same typed API as email and SMS.whatsapp.ts200 · 480msimport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.whatsapp.send({
to: '+14155550182',
template: 'order_shipped',
variables: { order: 'RG-29481', carrier: 'UPS' },
});Order RG-29481 shippedHey Ada — your order is on the way. Carrier UPS, ETA Wednesday.Track orderContact support9:42 AM ✓✓New API soon - Sign up to get notifiedOfficial Cloud API accessTemplate + session messagingInteractive buttons and listsDelivery + read receipts
[H2] We are a team of engineers who love building tools for other engineers.
Test mode, real-time webhooks, and an MCP server for the agent on your shoulder.Delivereddelivered@bird.devSend202 Accepted: { "id": "em_01kove1gv2hs72p4rq94zmt" }202 Accepted: { "id": "em_01k50rmp0fe5kbyt8rah4ja" }202 Accepted: { "id": "em_01km947y1ofmto7ilsfudgv" }202 Accepted: { "id": "em_01k3eho76xg32xg32tk7idg" }202 Accepted: { "id": "em_01kkju9g76dgb6psfupkna1" }202 Accepted: { "id": "em_01k1o7qlcfexojyhwvqxw7i" }Test mode. Simulate every state — delivered, bounced, complained, queued — without burning real budget or hitting a real recipient.POST /webhooks/bird15:42:16200sms.failed128ms15:42:13500email.delivered42ms15:42:10200whatsapp.read55ms15:42:07200voice.completed91ms15:42:04200sms.failed128ms15:42:01200email.delivered42msModular webhooks. Real-time event webhooks, per channel. email.delivered, sms.failed, voice.completed, whatsapp.read. HMAC-signed. Replay-protected. Same shape every channel.MCP for agents. Connect Claude or Cursor to Bird's hosted MCP server, or run it locally with the bird CLI. Your agent gets typed tools across every channel — scoped keys, full audit, no leakage.
[H2] Five products.
[H2] One shared layer.
Email, SMS, voice, WhatsApp, and Realtime — all built on the same primitives. Learn the platform once, ship across every channel.Auth. One key format. Scoped to send vs. manage, read vs. write. Prefix + fingerprint so you know which key did what. Multiple keys live at once, so you rotate on your schedule.Idempotency. Idempotency-Key on every POST, PATCH, and DELETE. Replays come back free and flagged. Reuse a key with a different body and you get a 409, not a surprise.Errors. One envelope. One closed type union. Every code ships with a docs link and a message that tells you what to do.Webhooks. Standard Webhooks spec: HMAC-SHA256, per-endpoint secrets, 5-minute replay window — verify with any off-the-shelf library. Rotate secrets with a 24-hour dual-signing overlap. Attempt logs and replay built in.Pagination. Cursor-based. Stable order on every list, enforced by construction — no page drift, ever.Rate limits. IETF RateLimit headers on every response — not just the 429. You can see your budget before you hit the wall, and Retry-After when you do.Suppressions. Bounces, complaints, unsubscribes — managed automatically, queryable and editable via API. Transactional streams can bypass marketing unsubscribes. Idempotent by design.
[H2] Your messages,
actually arriving.
Real-time signals on inbox placement, bounce rates, and send volume — across every channel, every region. No guesswork.*****+++====-----:::::::·········· ··::--=++**
*+++===---:::::········· ···::--=++*****
===---:::······ ···:::--=+++*******
--:::···· ····::---==++********++
::··· ·····::---==++*********++=-
·· ·····:::---==++*********++=--:
· ······:::---==+++*********++=-::·
·····:::---==+++*********++=-::·
····:::---==+++********++=--:··
· ····:::---==++********++=--:·
···· ···:::--==++********+==-:··
::::········ ···::--==++*******++=--:·
=-----::::::::·········· ··::--=++********+=-::·
++++=======---------::::::····· ···:--=++*******+=--:
********++++++++++=======----:::··· ··:--=++******++=-
***********************+++++===---::··· ··:-==+*******+=
******************************+++===--::·· ·::-=++******+
===++++++++++*********************+++==--:·· ·:--=+******
::---------=======++++++**************++=--:·· ··:-=++****
········::::::::-----====++++***********++=--:·· ··:-=++***
········::::---===+++*********++==-:·· ··:-=++**
·····:::--==+++*********+==-:·· ··:-=++*
····:::--==++********++=-::· ··:-=++*World's commercial messages, by volume, transit the Bird network.40%-==++*********+==--:·· ··::-==++********++==--:··
=++*********++=--::· ··::-==++*********++=--:··
+*********++=--::·· ··::-==++*********++=--::·· ··
********++=--::·· ··::--=++*********++=--::·· ··::
******++==-::·· ··::--=++*********++==-::·· ··::--
****++==-::·· ··:--=++*********++==-::·· ··::--=+
**++==-::·· ··:--==+*********++==-::·· ··:--=++*
++==--:·· ··:--==++********++==-::·· ··:--==++**
==--:·· ··:--==++********++==--:·· ··:--==++****
--:·· ··::-==++********++==--:·· ··::-==++******
::· ··::-==++*********++=--:·· ··::-==++********
·· ··::-==++*********++=--::·· ··::-==++*********+
··::--=++*********++=--::·· ··::-==++*********++=
··::--=++*********++==-::·· ··::--=++*********++=--
··:--=++*********++==-::·· ··::--=++*********++==-::
··:--==+*********++==-::·· ··:--=++*********++==-::··
··:--==++********++==-::·· ··:--==++********++==-::··
·:--==++********++==--:·· ··:--==++********++==-::··
:-==++********++==--:·· ··::-==++********++==--:··
==++*********++=--:·· ··::-==++********++==--:··
++*********++=--::·· ··::-==++*********++=--:·· ·
*********++=--::·· ··::-==++*********++=--::·· ··:
*******++==-::·· ··::--=++*********++=--::·· ··::-Countries with direct carrier relationships, route diversity, and local compliance handled.190+*+=:·· ··:=+**+-· ·:-=++++==:· ·-=+****+=-· ·:=***
*+-:· ·:-+***=:· ·:-=++***+=-: ·:-=+**++=:· ·:=***
*=-· ·:=+**+-: ··-=+******+=:· ·-=++++=-:· ·-=***
+=:· ·-+***=-· ··:=+********+-: ·:-=+++=-: ·-+***
+-: ·:=***+=:· ··:=+*********+=:· :-=====-· ·-+***
+-· ·-+***=-:····::-++**********+-· ·:-===-:· ·-+***
=:· ·:=***+=-::::--=+************=: ::----:· :=+***
=:· :-+***+=----==+*****++++****+-· ·::--:· :=+***
=: ·-+****+====++*****+====+****=: ·::::· ·:=****
-· ··· :=+***++++++*****+=----=+***+-· ····· ·-+****
-· ···· ·-+*****++******+=-::::-=+**+=: ··· :-+****
-· ··::·· ·:=+***********+=-:····:-+***=-· ·:=+****
-· ·::::· :-+**********+=-:· ··:=+**+-: ·-=*****
:· ·::::·· ·-=+********+=-:· ·-=***=:· :-+*****
: ·:--::· ·:=+*******+=-:· :-+**+-: ·:=+****+
: ·:----:· :-=+*****++=:· ·:=***=-· ·-=****++
: ·:-----:· ·:=++***++=-· ·-+**+-:· ·:-+****++
: ·:-===-:· ·:-=+++++=-:· ·· ·:=***=-:· ·:-=+***++=
: ·:-===-:· ·-==+++=-:· ····· ·-+**+=-:···:-=+****+==
: ·:-====-: ·:-====-:· ··::::· :=***+=-:::--=****+==-
: ·-=====-:· ·::-----:· ·:----:· ·-+***+=----=+****+=-:
: ·-==+==-:· ·:----:· ·:-====-:· :=***++====+****+=-::
: ·-==++=-:· ·:::::·· ·:-=++++=-: ·-+***+++++*****=-::·Running this infrastructure. The team behind it is the team building the API.10 years

11082 chars

SUB-PAGE (https://sparkpost.com/dashboard/signup/) Bird · Messaging infrastructure for developers — Bird

[H1] Messaging infrastructure
for developers.
A developer API for email, SMS, voice, and WhatsApp.Running on the network that already carries 40% of the world's commercial messages.Get startedRead docsUsing Claude Code, Cursor, or Codex? Copy a setup prompt and your agent installs the Bird CLI and skills for you. Pick yours:Claude CodeCopied!CodexCopied!CursorCopied!Trusted every day by teams that build world-class softwareRead more customer stories
[H2] Drop it in.
[H2] Same shape, every stack.
SDKs in every major runtime. REST when you need it and SMTP coming soon. MCP for the agent on your shoulder.Node.jsPythonJava.NETPHPGoRustRubyElixirServerlessRESTSMTPCLIExpressNext.jsNestJSFastifyNuxtHonoBunAstroKoaRemix123456789101112131415161718import express from 'express';
import { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
const app = express();
app.use(express.json());
app.post('/welcome', async (req, res) => {
await bird.email.send({
from: 'onboarding@bird.dev',
to: [req.body.email],
subject: 'Welcome to Bird',
html: '<p>You are in.</p>',
});
res.json({ sent: true });
});
Copy Code01 Direct sending IPs / React Email rendering (Soon) / Managed warm-up
[H2] Send Email. HTML and plain text, React Email soon. Delivered on the network the ISPs already trust.
Read Email DocsDirect sending IPs, managed warm-up, ISP-aware routing, SPF/DKIM/DMARC handled. Templates render in HTML and plain text; React Email coming soon.email.tsx200 · 1.2simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.email.send({
from: 'onboarding@bird.dev',
subject: 'Hello from Bird',
html: '<p>Your first email is <strong>live</strong>.</p>',
});Your invite is readyWelcome aboard, Ada.You can sign in any time at bird.com/login.Your test API key is on your dashboard, ready to send.Copy codeCopiedCopy as promptCopiedView on GithubPer-ISP delivery breakdownPer-message audit log02 A2P 10DLC / Tier-1 carriers / voice OTP fallbackSMS is being upgraded
[H2] Send SMS. Tier-1 carriers, 190+ countries, with the compliance overhead handled for you.
A2P 10DLC, alpha sender IDs, DLT entity registration — we file what you have to file. Smart routing per destination. Voice OTP fallback when SMS degrades. A 6-digit code lands in under three seconds on the lines that matter.sms.ts200 · 0.4simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.sms.send({
from: 'Bird',
to: '+14155550182',
text: 'Your Bird code is 482917.',
});Today at 2:14 PMHey Ada — your Bird sign-in code is 482917. It'll expire in 10 minutes. Don't share it with anyone.482917DeliveredNew API soon - Sign up to get notified10DLC application + brand vetting in 48hRoute diversity per destinationVoice OTP fallback (opt-in per account)Segment-accurate pricing in the response03 PSTN + SIP / streaming TTS / declarative flowsVoice is being upgraded
[H2] Use Voice. Programmable voice, on PSTN and SIP, with TTS that doesn't sound robotic.
Outbound and inbound. Declarative flow JSON for IVR. Recording and live transcription. Streaming TTS in thirty languages with sub-250 ms first-byte audio — the model loads before the call connects.voice.ts201 · 0.4simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.calls.create({
from: '+14155550100',
to: '+14155550182',
flow: [{ say: 'Your verification code is four, eight, two...' }],
});Bird Verify+1 (415) 555-0182Yourverificationcodeisfoureighttwonineoneseven.New API soon - Sign up to get notifiedStreaming TTS in 30+ languagesDeclarative flows: say, gather, dial, transferRecording + live transcript over WebSocketPSTN + SIP termination, BYOC supported04 Cloud API / template messages / interactive repliesWhatsApp is being upgraded
[H2] Send WhatsApp. Official Cloud API. Templates, interactive buttons, and media — on the channel three billion people already use.
Pre-approved templates, session messaging, and interactive replies. Delivery and read receipts on every message. One number, every conversation — with the same typed API as email and SMS.whatsapp.ts200 · 480msimport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.whatsapp.send({
to: '+14155550182',
template: 'order_shipped',
variables: { order: 'RG-29481', carrier: 'UPS' },
});Order RG-29481 shippedHey Ada — your order is on the way. Carrier UPS, ETA Wednesday.Track orderContact support9:42 AM ✓✓New API soon - Sign up to get notifiedOfficial Cloud API accessTemplate + session messagingInteractive buttons and listsDelivery + read receipts
[H2] We are a team of engineers who love building tools for other engineers.
Test mode, real-time webhooks, and an MCP server for the agent on your shoulder.Delivereddelivered@bird.devSend202 Accepted: { "id": "em_01kove1gv2hs72p4rq94zmt" }202 Accepted: { "id": "em_01k50rmp0fe5kbyt8rah4ja" }202 Accepted: { "id": "em_01km947y1ofmto7ilsfudgv" }202 Accepted: { "id": "em_01k3eho76xg32xg32tk7idg" }202 Accepted: { "id": "em_01kkju9g76dgb6psfupkna1" }202 Accepted: { "id": "em_01k1o7qlcfexojyhwvqxw7i" }Test mode. Simulate every state — delivered, bounced, complained, queued — without burning real budget or hitting a real recipient.POST /webhooks/bird15:42:16200sms.failed128ms15:42:13500email.delivered42ms15:42:10200whatsapp.read55ms15:42:07200voice.completed91ms15:42:04200sms.failed128ms15:42:01200email.delivered42msModular webhooks. Real-time event webhooks, per channel. email.delivered, sms.failed, voice.completed, whatsapp.read. HMAC-signed. Replay-protected. Same shape every channel.MCP for agents. Connect Claude or Cursor to Bird's hosted MCP server, or run it locally with the bird CLI. Your agent gets typed tools across every channel — scoped keys, full audit, no leakage.
[H2] Five products.
[H2] One shared layer.
Email, SMS, voice, WhatsApp, and Realtime — all built on the same primitives. Learn the platform once, ship across every channel.Auth. One key format. Scoped to send vs. manage, read vs. write. Prefix + fingerprint so you know which key did what. Multiple keys live at once, so you rotate on your schedule.Idempotency. Idempotency-Key on every POST, PATCH, and DELETE. Replays come back free and flagged. Reuse a key with a different body and you get a 409, not a surprise.Errors. One envelope. One closed type union. Every code ships with a docs link and a message that tells you what to do.Webhooks. Standard Webhooks spec: HMAC-SHA256, per-endpoint secrets, 5-minute replay window — verify with any off-the-shelf library. Rotate secrets with a 24-hour dual-signing overlap. Attempt logs and replay built in.Pagination. Cursor-based. Stable order on every list, enforced by construction — no page drift, ever.Rate limits. IETF RateLimit headers on every response — not just the 429. You can see your budget before you hit the wall, and Retry-After when you do.Suppressions. Bounces, complaints, unsubscribes — managed automatically, queryable and editable via API. Transactional streams can bypass marketing unsubscribes. Idempotent by design.
[H2] Your messages,
actually arriving.
Real-time signals on inbox placement, bounce rates, and send volume — across every channel, every region. No guesswork.*****+++====-----:::::::·········· ··::--=++**
*+++===---:::::········· ···::--=++*****
===---:::······ ···:::--=+++*******
--:::···· ····::---==++********++
::··· ·····::---==++*********++=-
·· ·····:::---==++*********++=--:
· ······:::---==+++*********++=-::·
·····:::---==+++*********++=-::·
····:::---==+++********++=--:··
· ····:::---==++********++=--:·
···· ···:::--==++********+==-:··
::::········ ···::--==++*******++=--:·
=-----::::::::·········· ··::--=++********+=-::·
++++=======---------::::::····· ···:--=++*******+=--:
********++++++++++=======----:::··· ··:--=++******++=-
***********************+++++===---::··· ··:-==+*******+=
******************************+++===--::·· ·::-=++******+
===++++++++++*********************+++==--:·· ·:--=+******
::---------=======++++++**************++=--:·· ··:-=++****
········::::::::-----====++++***********++=--:·· ··:-=++***
········::::---===+++*********++==-:·· ··:-=++**
·····:::--==+++*********+==-:·· ··:-=++*
····:::--==++********++=-::· ··:-=++*World's commercial messages, by volume, transit the Bird network.40%-==++*********+==--:·· ··::-==++********++==--:··
=++*********++=--::· ··::-==++*********++=--:··
+*********++=--::·· ··::-==++*********++=--::·· ··
********++=--::·· ··::--=++*********++=--::·· ··::
******++==-::·· ··::--=++*********++==-::·· ··::--
****++==-::·· ··:--=++*********++==-::·· ··::--=+
**++==-::·· ··:--==+*********++==-::·· ··:--=++*
++==--:·· ··:--==++********++==-::·· ··:--==++**
==--:·· ··:--==++********++==--:·· ··:--==++****
--:·· ··::-==++********++==--:·· ··::-==++******
::· ··::-==++*********++=--:·· ··::-==++********
·· ··::-==++*********++=--::·· ··::-==++*********+
··::--=++*********++=--::·· ··::-==++*********++=
··::--=++*********++==-::·· ··::--=++*********++=--
··:--=++*********++==-::·· ··::--=++*********++==-::
··:--==+*********++==-::·· ··:--=++*********++==-::··
··:--==++********++==-::·· ··:--==++********++==-::··
·:--==++********++==--:·· ··:--==++********++==-::··
:-==++********++==--:·· ··::-==++********++==--:··
==++*********++=--:·· ··::-==++********++==--:··
++*********++=--::·· ··::-==++*********++=--:·· ·
*********++=--::·· ··::-==++*********++=--::·· ··:
*******++==-::·· ··::--=++*********++=--::·· ··::-Countries with direct carrier relationships, route diversity, and local compliance handled.190+*+=:·· ··:=+**+-· ·:-=++++==:· ·-=+****+=-· ·:=***
*+-:· ·:-+***=:· ·:-=++***+=-: ·:-=+**++=:· ·:=***
*=-· ·:=+**+-: ··-=+******+=:· ·-=++++=-:· ·-=***
+=:· ·-+***=-· ··:=+********+-: ·:-=+++=-: ·-+***
+-: ·:=***+=:· ··:=+*********+=:· :-=====-· ·-+***
+-· ·-+***=-:····::-++**********+-· ·:-===-:· ·-+***
=:· ·:=***+=-::::--=+************=: ::----:· :=+***
=:· :-+***+=----==+*****++++****+-· ·::--:· :=+***
=: ·-+****+====++*****+====+****=: ·::::· ·:=****
-· ··· :=+***++++++*****+=----=+***+-· ····· ·-+****
-· ···· ·-+*****++******+=-::::-=+**+=: ··· :-+****
-· ··::·· ·:=+***********+=-:····:-+***=-· ·:=+****
-· ·::::· :-+**********+=-:· ··:=+**+-: ·-=*****
:· ·::::·· ·-=+********+=-:· ·-=***=:· :-+*****
: ·:--::· ·:=+*******+=-:· :-+**+-: ·:=+****+
: ·:----:· :-=+*****++=:· ·:=***=-· ·-=****++
: ·:-----:· ·:=++***++=-· ·-+**+-:· ·:-+****++
: ·:-===-:· ·:-=+++++=-:· ·· ·:=***=-:· ·:-=+***++=
: ·:-===-:· ·-==+++=-:· ····· ·-+**+=-:···:-=+****+==
: ·:-====-: ·:-====-:· ··::::· :=***+=-:::--=****+==-
: ·-=====-:· ·::-----:· ·:----:· ·-+***+=----=+****+=-:
: ·-==+==-:· ·:----:· ·:-====-:· :=***++====+****+=-::
: ·-==++=-:· ·:::::·· ·:-=++++=-: ·-+***+++++*****=-::·Running this infrastructure. The team behind it is the team building the API.10 years

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SUB-PAGE (https://sparkpost.com/en-us/docs/) Support Documentation – SparkPost

Skip to main contentDocumentationBillingExpand MenuDeliverabilityExpand MenuFAQExpand MenuGetting StartedExpand MenuIntegrationsExpand MenuMy Account & ProfileExpand MenuRecipient ValidationExpand MenuReportingExpand MenuSparkPost Signals®Expand MenuTech ResourcesExpand MenuUser GuideExpand MenuSubmit a TicketCustomersDeveloper BlogDeveloper HubService Status
[H1] Help & API
Getting StartedWelcome to SparkPost! Get familiar with our product and explore its features:New User GuideNew to SparkPost? Get set up with our new user guide.Learn MoreSending Your First EmailSending your first email via SMTP or REST.Learn MoreAPI DocsCheck out our full API reference.View DocumentationMigration GuidesMoving to SparkPost from another service? Read through our in-depth migration guides.SendGrid Migration GuideMandrill Migration GuideMailgun Migration GuideMailjet Migration GuideClient LibrariesOur client libraries allow you to use SparkPost with your language of choice Node PHP Python Java Elixir NodeMailer GoQuestions? We're here to help.We’re always happy to help with code or other questions you might have!To find the best resource for your question and fastest resolution, check out ourhow to get help guide Submit a ticket FAQs

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SUB-PAGE (https://sparkpost.com/en-us/products/email/) Bird · Messaging infrastructure for developers — Bird

[H1] Messaging infrastructure
for developers.
A developer API for email, SMS, voice, and WhatsApp.Running on the network that already carries 40% of the world's commercial messages.Get startedRead docsUsing Claude Code, Cursor, or Codex? Copy a setup prompt and your agent installs the Bird CLI and skills for you. Pick yours:Claude CodeCopied!CodexCopied!CursorCopied!Trusted every day by teams that build world-class softwareRead more customer stories
[H2] Drop it in.
[H2] Same shape, every stack.
SDKs in every major runtime. REST when you need it and SMTP coming soon. MCP for the agent on your shoulder.Node.jsPythonJava.NETPHPGoRustRubyElixirServerlessRESTSMTPCLIExpressNext.jsNestJSFastifyNuxtHonoBunAstroKoaRemix123456789101112131415161718import express from 'express';
import { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
const app = express();
app.use(express.json());
app.post('/welcome', async (req, res) => {
await bird.email.send({
from: 'onboarding@bird.dev',
to: [req.body.email],
subject: 'Welcome to Bird',
html: '<p>You are in.</p>',
});
res.json({ sent: true });
});
Copy Code01 Direct sending IPs / React Email rendering (Soon) / Managed warm-up
[H2] Send Email. HTML and plain text, React Email soon. Delivered on the network the ISPs already trust.
Read Email DocsDirect sending IPs, managed warm-up, ISP-aware routing, SPF/DKIM/DMARC handled. Templates render in HTML and plain text; React Email coming soon.email.tsx200 · 1.2simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.email.send({
from: 'onboarding@bird.dev',
subject: 'Hello from Bird',
html: '<p>Your first email is <strong>live</strong>.</p>',
});Your invite is readyWelcome aboard, Ada.You can sign in any time at bird.com/login.Your test API key is on your dashboard, ready to send.Copy codeCopiedCopy as promptCopiedView on GithubPer-ISP delivery breakdownPer-message audit log02 A2P 10DLC / Tier-1 carriers / voice OTP fallbackSMS is being upgraded
[H2] Send SMS. Tier-1 carriers, 190+ countries, with the compliance overhead handled for you.
A2P 10DLC, alpha sender IDs, DLT entity registration — we file what you have to file. Smart routing per destination. Voice OTP fallback when SMS degrades. A 6-digit code lands in under three seconds on the lines that matter.sms.ts200 · 0.4simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.sms.send({
from: 'Bird',
to: '+14155550182',
text: 'Your Bird code is 482917.',
});Today at 2:14 PMHey Ada — your Bird sign-in code is 482917. It'll expire in 10 minutes. Don't share it with anyone.482917DeliveredNew API soon - Sign up to get notified10DLC application + brand vetting in 48hRoute diversity per destinationVoice OTP fallback (opt-in per account)Segment-accurate pricing in the response03 PSTN + SIP / streaming TTS / declarative flowsVoice is being upgraded
[H2] Use Voice. Programmable voice, on PSTN and SIP, with TTS that doesn't sound robotic.
Outbound and inbound. Declarative flow JSON for IVR. Recording and live transcription. Streaming TTS in thirty languages with sub-250 ms first-byte audio — the model loads before the call connects.voice.ts201 · 0.4simport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.calls.create({
from: '+14155550100',
to: '+14155550182',
flow: [{ say: 'Your verification code is four, eight, two...' }],
});Bird Verify+1 (415) 555-0182Yourverificationcodeisfoureighttwonineoneseven.New API soon - Sign up to get notifiedStreaming TTS in 30+ languagesDeclarative flows: say, gather, dial, transferRecording + live transcript over WebSocketPSTN + SIP termination, BYOC supported04 Cloud API / template messages / interactive repliesWhatsApp is being upgraded
[H2] Send WhatsApp. Official Cloud API. Templates, interactive buttons, and media — on the channel three billion people already use.
Pre-approved templates, session messaging, and interactive replies. Delivery and read receipts on every message. One number, every conversation — with the same typed API as email and SMS.whatsapp.ts200 · 480msimport { BirdClient } from '@messagebird/sdk';
const bird = new BirdClient({ apiKey: process.env.BIRD_API_KEY! });
await bird.whatsapp.send({
to: '+14155550182',
template: 'order_shipped',
variables: { order: 'RG-29481', carrier: 'UPS' },
});Order RG-29481 shippedHey Ada — your order is on the way. Carrier UPS, ETA Wednesday.Track orderContact support9:42 AM ✓✓New API soon - Sign up to get notifiedOfficial Cloud API accessTemplate + session messagingInteractive buttons and listsDelivery + read receipts
[H2] We are a team of engineers who love building tools for other engineers.
Test mode, real-time webhooks, and an MCP server for the agent on your shoulder.Delivereddelivered@bird.devSend202 Accepted: { "id": "em_01kove1gv2hs72p4rq94zmt" }202 Accepted: { "id": "em_01k50rmp0fe5kbyt8rah4ja" }202 Accepted: { "id": "em_01km947y1ofmto7ilsfudgv" }202 Accepted: { "id": "em_01k3eho76xg32xg32tk7idg" }202 Accepted: { "id": "em_01kkju9g76dgb6psfupkna1" }202 Accepted: { "id": "em_01k1o7qlcfexojyhwvqxw7i" }Test mode. Simulate every state — delivered, bounced, complained, queued — without burning real budget or hitting a real recipient.POST /webhooks/bird15:42:16200sms.failed128ms15:42:13500email.delivered42ms15:42:10200whatsapp.read55ms15:42:07200voice.completed91ms15:42:04200sms.failed128ms15:42:01200email.delivered42msModular webhooks. Real-time event webhooks, per channel. email.delivered, sms.failed, voice.completed, whatsapp.read. HMAC-signed. Replay-protected. Same shape every channel.MCP for agents. Connect Claude or Cursor to Bird's hosted MCP server, or run it locally with the bird CLI. Your agent gets typed tools across every channel — scoped keys, full audit, no leakage.
[H2] Five products.
[H2] One shared layer.
Email, SMS, voice, WhatsApp, and Realtime — all built on the same primitives. Learn the platform once, ship across every channel.Auth. One key format. Scoped to send vs. manage, read vs. write. Prefix + fingerprint so you know which key did what. Multiple keys live at once, so you rotate on your schedule.Idempotency. Idempotency-Key on every POST, PATCH, and DELETE. Replays come back free and flagged. Reuse a key with a different body and you get a 409, not a surprise.Errors. One envelope. One closed type union. Every code ships with a docs link and a message that tells you what to do.Webhooks. Standard Webhooks spec: HMAC-SHA256, per-endpoint secrets, 5-minute replay window — verify with any off-the-shelf library. Rotate secrets with a 24-hour dual-signing overlap. Attempt logs and replay built in.Pagination. Cursor-based. Stable order on every list, enforced by construction — no page drift, ever.Rate limits. IETF RateLimit headers on every response — not just the 429. You can see your budget before you hit the wall, and Retry-After when you do.Suppressions. Bounces, complaints, unsubscribes — managed automatically, queryable and editable via API. Transactional streams can bypass marketing unsubscribes. Idempotent by design.
[H2] Your messages,
actually arriving.
Real-time signals on inbox placement, bounce rates, and send volume — across every channel, every region. No guesswork.*****+++====-----:::::::·········· ··::--=++**
*+++===---:::::········· ···::--=++*****
===---:::······ ···:::--=+++*******
--:::···· ····::---==++********++
::··· ·····::---==++*********++=-
·· ·····:::---==++*********++=--:
· ······:::---==+++*********++=-::·
·····:::---==+++*********++=-::·
····:::---==+++********++=--:··
· ····:::---==++********++=--:·
···· ···:::--==++********+==-:··
::::········ ···::--==++*******++=--:·
=-----::::::::·········· ··::--=++********+=-::·
++++=======---------::::::····· ···:--=++*******+=--:
********++++++++++=======----:::··· ··:--=++******++=-
***********************+++++===---::··· ··:-==+*******+=
******************************+++===--::·· ·::-=++******+
===++++++++++*********************+++==--:·· ·:--=+******
::---------=======++++++**************++=--:·· ··:-=++****
········::::::::-----====++++***********++=--:·· ··:-=++***
········::::---===+++*********++==-:·· ··:-=++**
·····:::--==+++*********+==-:·· ··:-=++*
····:::--==++********++=-::· ··:-=++*World's commercial messages, by volume, transit the Bird network.40%-==++*********+==--:·· ··::-==++********++==--:··
=++*********++=--::· ··::-==++*********++=--:··
+*********++=--::·· ··::-==++*********++=--::·· ··
********++=--::·· ··::--=++*********++=--::·· ··::
******++==-::·· ··::--=++*********++==-::·· ··::--
****++==-::·· ··:--=++*********++==-::·· ··::--=+
**++==-::·· ··:--==+*********++==-::·· ··:--=++*
++==--:·· ··:--==++********++==-::·· ··:--==++**
==--:·· ··:--==++********++==--:·· ··:--==++****
--:·· ··::-==++********++==--:·· ··::-==++******
::· ··::-==++*********++=--:·· ··::-==++********
·· ··::-==++*********++=--::·· ··::-==++*********+
··::--=++*********++=--::·· ··::-==++*********++=
··::--=++*********++==-::·· ··::--=++*********++=--
··:--=++*********++==-::·· ··::--=++*********++==-::
··:--==+*********++==-::·· ··:--=++*********++==-::··
··:--==++********++==-::·· ··:--==++********++==-::··
·:--==++********++==--:·· ··:--==++********++==-::··
:-==++********++==--:·· ··::-==++********++==--:··
==++*********++=--:·· ··::-==++********++==--:··
++*********++=--::·· ··::-==++*********++=--:·· ·
*********++=--::·· ··::-==++*********++=--::·· ··:
*******++==-::·· ··::--=++*********++=--::·· ··::-Countries with direct carrier relationships, route diversity, and local compliance handled.190+*+=:·· ··:=+**+-· ·:-=++++==:· ·-=+****+=-· ·:=***
*+-:· ·:-+***=:· ·:-=++***+=-: ·:-=+**++=:· ·:=***
*=-· ·:=+**+-: ··-=+******+=:· ·-=++++=-:· ·-=***
+=:· ·-+***=-· ··:=+********+-: ·:-=+++=-: ·-+***
+-: ·:=***+=:· ··:=+*********+=:· :-=====-· ·-+***
+-· ·-+***=-:····::-++**********+-· ·:-===-:· ·-+***
=:· ·:=***+=-::::--=+************=: ::----:· :=+***
=:· :-+***+=----==+*****++++****+-· ·::--:· :=+***
=: ·-+****+====++*****+====+****=: ·::::· ·:=****
-· ··· :=+***++++++*****+=----=+***+-· ····· ·-+****
-· ···· ·-+*****++******+=-::::-=+**+=: ··· :-+****
-· ··::·· ·:=+***********+=-:····:-+***=-· ·:=+****
-· ·::::· :-+**********+=-:· ··:=+**+-: ·-=*****
:· ·::::·· ·-=+********+=-:· ·-=***=:· :-+*****
: ·:--::· ·:=+*******+=-:· :-+**+-: ·:=+****+
: ·:----:· :-=+*****++=:· ·:=***=-· ·-=****++
: ·:-----:· ·:=++***++=-· ·-+**+-:· ·:-+****++
: ·:-===-:· ·:-=+++++=-:· ·· ·:=***=-:· ·:-=+***++=
: ·:-===-:· ·-==+++=-:· ····· ·-+**+=-:···:-=+****+==
: ·:-====-: ·:-====-:· ··::::· :=***+=-:::--=****+==-
: ·-=====-:· ·::-----:· ·:----:· ·-+***+=----=+****+=-:
: ·-==+==-:· ·:----:· ·:-====-:· :=***++====+****+=-::
: ·-==++=-:· ·:::::·· ·:-=++++=-: ·-+***+++++*****=-::·Running this infrastructure. The team behind it is the team building the API.10 years

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Explore the other reputation pillars for Bird

Information Density → Trust & Proof → Commodity Fingerprint → Identity & Authority →

Analysis Disclosure & Source Attribution

This page presents a snapshot of public data from Bird, captured on June 19, 2026, to show how machine logic reads Semantic Coherence signals into an AI reputation evaluation.

Purpose: This data is presented under “Fair Use” for the purpose of independent signal analysis, allowing readers to see the raw signals behind the reputation score.

Notice to Bird: This analysis is part of a non-adversarial audit conducted by 1 Euro SEO. The results are intended as professional feedback to help improve any website’s machine-readability and authority signals. The evaluation is free, and any company can request a fresh audit at any time.

Any company can use the insights for free and improve its voice. When a company has updated its content, it can always submit a new audit request, which will be reflected in a new current score.

To all users: You are encouraged to visit the live site at https://sparkpost.com to view the most current version of its content and see directly what this company is about and what it offers.

Semantic Coherence: Bird – Signal Evidence & AI Readability

Bird