# Telnyx SMS API by [Telnyx](/organizations/telnyx/) - **ID:** `fa054fe4-7a7d-40cf-9fa8-4a325c452a48` - **JSON API:** /api/v1/catalog/products/fa054fe4-7a7d-40cf-9fa8-4a325c452a48/ - **Slug:** telnyx-sms-api - **Product website:** https://telnyx.com/products/sms-api - **Documentation:** https://developers.telnyx.com/docs/messaging/messages/send-message - **llms.txt:** https://developers.telnyx.com/llms.txt - **Pricing:** https://telnyx.com/pricing/messaging - **Organization website:** https://telnyx.com - **Categories:** [Messaging and Chat](/categories/messaging-chat/) ## Description REST API for sending and receiving SMS messages globally, with delivery reports. ## AI-native score **Tier B — 60/100 · research coverage 62/100.** This grade measures agent-readiness and is not a substitute for your own security or vendor-risk review. See [methodology](/methodology/) for how the grade and coverage are computed. Unresearched decision fields score zero in the grade. | Component | Applies | Raw | Effective weight | Nominal weight | Contribution | | --- | --- | --- | --- | --- | --- | | Integration | Yes | 7/10 | 35% | 35% | 24.5 | | Trust | Yes | 2/6 | 30% | 30% | 10.0 | | Portability | Yes | 2/4 | 20% | 20% | 10.0 | | Security | Yes | 4/4 | 15% | 15% | 15.0 | - **Integration signals:** MCP server (+2); Command-line interface (+1); SDK / developer kit (+1); Agent skill (+1); Headless signup (+1); Verified llms.txt (+1) - **Trust signals:** Hard budget caps (available, +1); Verified trust center (+1) - **Portability signals:** Standard protocol access (+1); No proprietary-SDK lock-in (+1) - **Security signals:** MFA enforced (+2); Compliance certifications (+1); Access controls — RBAC / ABAC (+1) ## Trust & Data Policy - **Trust center:** [Vendor trust center]() - **WebMCP:** – No - **Headless signup:** ✓ Yes - **Multi-factor authentication:** ✓ Enforced - **Hard budget caps:** ○ Available - **Standard protocol access:** ✓ Yes - **No proprietary-SDK lock-in:** ✓ Yes - **Self-hostable:** – No - **Open source:** – No - **Not yet researched:** Zero data retention, No generative AI training, Sandbox environment, Data export, Data import, Open standards, Documented provider swap ## Attested absences These decision fields were researched and attested absent — not available based on current evidence, until contrary information supersedes the finding. Each carries the check performed, the page checked, and the date, so you can act on the negative without repeating the research. A label-scoped absence applies only to its label (e.g. no SOC 2 does not mean no certifications). - **Open source** — attested absent (whole field), checked 2026-10-08. Checked the SMS API product-overview page for an open-source or source-available offering; it presents only a hosted carrier-infrastructure messaging platform. Source: https://telnyx.com/products/sms-api - **Self-hostable** — attested absent (whole field), checked 2026-10-08. Checked the messaging pricing/plans page for a self-hosted or on-premises deployment option; it presents only hosted per-message usage pricing. Source: https://telnyx.com/pricing/messaging - **Web-MCP** — attested absent (whole field), checked 2026-10-07. Checked the developer documentation home for an in-browser WebMCP / document.modelContext affordance; the docs document only an HTTP API and SDKs, with no MCP mention. Source: https://developers.telnyx.com/docs/messaging/messages/send-message ## Security & Compliance We confirm that cited vendor pages support these certification claims; we do not independently audit the reports. A shared trust or security page can support several certifications. We do not require separate public report links because reports may require login, vendor approval, or a nondisclosure agreement. Ask the vendor for reports and applicable coverage before a procurement decision. These listings expose no per-claim check date; the entry's updated date does not date the supporting evidence. - **Compliance certifications:** General Data Protection Regulation, ISO/IEC 27001, ISO/IEC 27701, Payment Card Industry Data Security Standard, System and Organization Controls 2 - **Access controls:** Role-Based Access Control ## Capabilities No capabilities listed. ## Jobs To Be Done From cited vendor documentation, each completion verdict says whether an agent can deliver the job's main outcome by and large through this product and which steps still need a person. Scope may limit cases or prerequisites while preserving that outcome. An unknown verdict means the answer is not yet established. - **Send SMS programmatically** — Send SMS messages through a software API. - Route: API - Completion: Documented complete - Setup needs a human: Unknown - Per-task human step: None - On behalf of a principal: Supported - Scope: An authorized application or agent sends its principal's SMS through Telnyx POST /v2/messages after account, API-key, SMS-number and messaging-profile setup. The caller submits sender, recipient and text and receives a message identifier with queued status for tracking. - Conditions: The documented first-message workflow tests between two Telnyx numbers without carrier registration. Sending off-net to external carriers typically requires sender registration such as 10DLC or toll-free verification; complete applicable registration and obtain recipient permission before production use. Use E.164 numbers and an SMS-enabled sender assigned to a messaging profile. Queued status confirms submission rather than guaranteed recipient receipt. Optional per-profile daily spend limits reject new messages after enforcement; a short delay can allow slight overspend. Setup human requirement remains unknown. ## Offers **Pricing page:** https://telnyx.com/pricing/messaging No offers listed. ## Reviews No approved reviews yet. ## Benchmarks No benchmarks listed. ## Documentation The primary documentation link is at the top of this page. No other documentation links listed. ## API Specs Not yet researched. ## MCP Servers - [Telnyx MCP](https://api.telnyx.com/v2/mcp) ## A2A Servers Not yet researched. ## Native Connectors Not yet researched. ## Command-Line Interfaces - [Telnyx CLI](https://developers.telnyx.com/docs/development/cli) (`telnyx-cli`) ## Developer Kits - [Telnyx Python SDK](https://developers.telnyx.com/docs/development/sdk) — Languages: Python ## Agent Skills - [Telnyx Bot Signup](https://telnyx.com/agent-signup.md) ## Related products - [Brevo](/organizations/brevo/products/brevo/) by Brevo — Tier C. Same job: Send SMS programmatically (not assessed). - [Commune](/organizations/commune/products/commune/) by Commune — Tier C. Same job: Send SMS programmatically (not assessed). - [Twilio](/organizations/twilio/products/twilio-messaging/) by Twilio — Unrated. Same job: Send SMS programmatically (not assessed). - [Vonage SMS API](/organizations/vonage/products/vonage-sms-api/) by Vonage — Unrated. Same job: Send SMS programmatically (not assessed). - [Sinch SMS API](/organizations/sinch/products/sinch-sms-api/) by Sinch — Unrated. Same job: Send SMS programmatically (not assessed). - [Plivo SMS API](/organizations/plivo/products/plivo-sms-api/) by Plivo — Unrated. Same job: Send SMS programmatically (not assessed). ## Add this badge to your site Own this product? The Open Agent Guide badge shows visitors and crawling agents your verified AI-native grade, stays current as your entry is verified, and links back to this page. It reflects only the verified tier and can't be self-set. Badge image: https://www.openagentguide.com/organizations/telnyx/products/telnyx-sms-api/badge.svg (seal), https://www.openagentguide.com/organizations/telnyx/products/telnyx-sms-api/badge.svg?style=flat (flat). 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