Category · Communication
SMS, WhatsApp and messaging APIs for AI agents
APIs for SMS, MMS, WhatsApp, RCS and other customer messaging channels. Email and in-app chat are compared separately. Compared on price per message by country, channel coverage, sender registration (10DLC, WhatsApp business verification), inbound webhooks and what an agent needs before it can send its first message.
Capability keys messaging.sms · messaging.mms · messaging.whatsapp · messaging.rcs · messaging.verify · messaging.inbound · All tools
letme.dev/messaging.sms picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | Twilio API + MCPTwilio · HTTP API | Messaging | A | 80.4 | 3.5 (8) | n/a | n/a | Pay per use | OAuth or key | Hosted + local | ||
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Programmable Messaging (SMS, MMS, WhatsApp, RCS) and Verify over REST. Top strength Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login Top weakness US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate |
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| 17 | Bird API + MCPBird (formerly MessageBird) · HTTP API | Messaging | BB | 77.7 | 3.6 (8) | n/a | n/a | Pay per use | OAuth or key | Hosted + local | ||
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Bird's rebuilt developer API sends SMS and WhatsApp (plus email and voice) from one account, with an OpenAPI 3.1 spec, generated SDKs, a CLI and a hosted OAuth MCP server at mcp.bird.com. Top strength API keys with per-product read or write scopes, expiry and CIDR limits, and a read-only default login Top weakness No free SMS or WhatsApp allowance, and we found no way to top up the prepaid balance by API |
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| 54 | Telnyx API + MCPTelnyx · HTTP API | Messaging | BB | 73.8 | 3.5 (2) | n/a | n/a | Pay per use | API key | Hosted + local | ||
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Carrier-owned CPaaS with SMS, MMS, RCS and WhatsApp on one REST API, plus an official hosted MCP server at api.telnyx.com/v2/mcp and a stdio MCP package. Top strength US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md Top weakness No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation |
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| 146 | Vonage Messages API + MCPVonage (Ericsson) · HTTP API | Messaging | B | 67.1 | 3.0 (2) | n/a | n/a | Pay per use | OAuth or key | Hosted + local | ||
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One endpoint (POST /v1/messages) for SMS, MMS, WhatsApp, RCS, Viber and Messenger, with failover between channels. Top strength POST /v1/messages covers six channels, with SMS failover for WhatsApp and RCS Top weakness No idempotency key, and channel rejections arrive only by status webhook after a 202 |
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| 185 | Bandwidth Messaging API + MCPBandwidth · HTTP API | Messaging | B | 64.3 | 3.5 (2) | n/a | n/a | Paid | OAuth | Hosted + local | ||
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US carrier's messaging API for SMS, MMS and RCS over 10DLC, toll-free and short codes, with published US rates. Top strength 10DLC SMS $0.004, toll-free $0.007 and short code $0.008 a message, published Top weakness Messaging accounts are onboarded by sales, and the free Build trial covers voice only |
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| 206 | Sinch Messaging APIs + MCPSinch · HTTP API | Messaging | B | 63.3 | 3.0 (2) | n/a | n/a | Pay per use | OAuth or key | Hosted + local | ||
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The SMS REST API and the Conversation API, which sends SMS, RCS, WhatsApp, Viber and Messenger through one message format, plus the Verification API. Top strength The Conversation API covers SMS, RCS, WhatsApp, Viber and Messenger through one message format Top weakness The MCP server is a developer preview whose npm release dates from 2026-04-14 |
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| 250 | Plivo APIPlivo · HTTP API | Messaging | C | 60.3 | 3.5 (2) | n/a | n/a | Pay per use | API key | Hosted | ||
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CPaaS REST API for SMS, MMS, RCS and WhatsApp in 190+ countries, alongside voice. Top strength US long code SMS $0.0077 a message and numbers $0.50 a month, with carrier surcharges listed per carrier Top weakness No OpenAPI spec |
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| 267 | Infobip API + MCPInfobip · HTTP API | Messaging | C | 59.3 | 2.5 (2) | n/a | n/a | Pay per use | OAuth or key | Hosted | ||
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Per-channel REST APIs and a unified Messages API for SMS, MMS, WhatsApp, RCS and Viber, plus 2FA. Top strength API keys with scopes, expiry dates and IP allowlists, and OAuth 2.1 on the MCP servers Top weakness Europe-wide traffic processing degraded on 2026-08-10 (about 1 hour) and 2026-08-15 (about 3 hours) |
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| 343 | 360dialog WhatsApp API + MCP360dialog · HTTP API | Messaging | D | 52.2 | 3.0 (2) | n/a | n/a | $59 / mo | OAuth or key | Hosted | ||
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WhatsApp Business Solution Provider with a Cloud API proxy for sending and receiving WhatsApp messages, billed per number per month with Meta's fees passed through. Top strength Meta's per-message fees passed through at cost, plus a flat €49 to €249 a number a month Top weakness No changelog, official SDK or standalone OpenAPI download |
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| 379 | ClickSend SMS API + MCPClickSend (Sinch) · HTTP API | Messaging | D | 47.8 | 2.5 (2) | n/a | n/a | $3.53 / mo | API key | Hosted + local | ||
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Prepaid SMS and MMS API aimed at small businesses, part of Sinch, with RCS, voice, email and post on the same account. Top strength A keyless pricing endpoint returns per-country, per-tier SMS and MMS prices Top weakness The MCP logs the Basic auth header, which encodes the API key, to stderr on every request |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
Indexed, not reviewed (20)
Listings sorted into this category from public catalogues (the official MCP registry, APIs.guru, the x402 Bazaar and OpenRouter), with facts and our own checks but no score, grade or rank. How the index works.
| Listing | Kind | What it does | Why it's here |
|---|---|---|---|
| cadence cadencercs.com | MCP server | Send RCS messages from your agent and get typed replies. Automatic SMS fallback. | vendor's own |
| Cavyro cavyro.com | MCP server | Telegram-native CRM for agents: contacts, deals, pipelines, campaigns, docs and reports. | vendor's own |
| elfa.ai MCP server elfa.ai | MCP server | Crypto social intelligence from X and Telegram, plus the Elfa Auto condition engine | vendor's own |
| EZTexting MCP eztexting.com | MCP server | Official EZTexting MCP server: SMS/MMS messaging, contacts, workflows, reports. | vendor's own |
| FlowCastle flowcastle.ai | MCP server | Build, edit, and deploy Telegram bots on FlowCastle's hosted visual flow platform. | vendor's own |
| Formmy formmy.app | MCP server | Run WhatsApp AI agents: manage agents, conversations, CRM contacts, orders and RAG docs. | vendor's own |
| GuildControl MCP guildcontrol.lasers.app | MCP server | Safety-first MCP server for Discord with privacy-safe reads, audits, and reviewed administration | vendor's own |
| instantreply.co MCP server instantreply.co | MCP server | AI access to InstantReply WhatsApp, Instagram, and Messenger inboxes with browser pairing. | vendor's own |
| JustCall MCP Server mcp.justcall.host | MCP server | JustCall MCP Server enables LLMs and AI agents to make voice calls and send SMS via JustCall APIs. | vendor's own |
| Kudosity kudosity.com | MCP server | Send SMS, MMS and WhatsApp, manage contacts and webhooks, from AI agents. | vendor's own |
| Limzo Telegram Group Stats limzo.com | MCP server | Read-only stats for public Telegram groups tracked by Limzo, the anti-spam bot. No API key. | vendor's own |
| lookup verirouteintel.com | MCP server | Is this number safe to call or text right now? Live carrier, CNAM, spam and SMS checks for agents. | vendor's own |
| octapi octapi.app | MCP server | A business's WhatsApp front desk as tools: inbox, customers, catalogue, bookings, fees. | vendor's own |
| politicalcomms.com MCP server politicalcomms.com | MCP server | Compliant political SMS/MMS from MCP clients: projects, contacts, analytics, billing. | vendor's own |
| Quackr quackr.io | MCP server | Virtual phone numbers for SMS verification, OTP receipt, and number management. | vendor's own |
| RCS Campaigns rcs-campaigns.com | MCP server | Send RCS & SMS campaigns: templates, audiences, surveys, inbox replies, delivery webhooks. | vendor's own |
| telemost-mcp-server telemost.io | MCP server | Telegram channel analytics and statistics for AI agents, pay-per-call in USDC via x402. | vendor's own |
| uni-msg WhatsApp uni-msg.com | MCP server | Drive WhatsApp from any MCP client: pair devices, send text and media, manage contacts and groups. | vendor's own |
| whatsapp wacli.me | MCP server | Your own WhatsApp as an MCP server: read, search and send from any MCP client. | vendor's own |
| WhatsApp Campaigns wa-campaigns.com | MCP server | Send WhatsApp campaigns: templates, audiences, surveys, inbox replies, delivery webhooks. | vendor's own |
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
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