{ "data": { "a": { "slug": "aws-end-user-messaging", "name": "AWS End User Messaging", "vendor": "Amazon Web Services", "vendorUrl": "https://aws.amazon.com/end-user-messaging/", "kind": "http-api", "category": "messaging", "summary": "AWS's messaging service for SMS, MMS, RCS, WhatsApp, voice and push, formerly the channel APIs of Amazon Pinpoint. Agents call the SMS and Voice v2 API or the Social Messaging API with IAM-signed requests, through the AWS CLI or SDKs.", "url": "https://www.anchorterminal.com/tools/aws-end-user-messaging", "markdownUrl": "https://www.anchorterminal.com/tools/aws-end-user-messaging.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/aws-end-user-messaging.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/aws-end-user-messaging.json", "repo": "https://github.com/aws/api-models-aws", "license": "Proprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0", "transports": [ "http" ], "remoteUrl": "https://sms-voice.us-east-1.amazonaws.com", "packages": [ { "registry": "npm", "name": "@aws-sdk/client-pinpoint-sms-voice-v2" }, { "registry": "npm", "name": "@aws-sdk/client-socialmessaging" }, { "registry": "pypi", "name": "boto3" } ], "auth": "mixed", "authNotes": "Requests are signed with AWS Signature Version 4 using IAM credentials, long-lived access keys or temporary credentials from AWS STS. IAM policies use the `sms-voice` action prefix with resource ARNs and condition keys. Access is self-serve with an AWS account, but each Region starts in a sandbox, and production access is granted through an AWS Support case. US numbers need carrier registration, and WhatsApp needs a linked WhatsApp Business Account.", "pricing": "usage", "pricingNotes": "Pay per message with no monthly minimum. US SMS is $0.00774 a message part plus a $0.00421 carrier fee, UK SMS $0.05, US MMS $0.02 plus $0.01. WhatsApp adds $0.005 per outbound message to Meta's fee. Push is free for the first 1,000,000 notifications a month. There is no SMS free allowance. New AWS customers get up to $200 in Free Tier credits, and AWS says most can sign up without a payment method. The sandbox lets an account send to verified numbers without a contract (https://aws.amazon.com/end-user-messaging/pricing/, https://aws.amazon.com/free/free-tier-faqs/).", "priceSummary": "$1 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the user guide index, the API models or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": 406900, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://docs.aws.amazon.com/sms-voice/latest/userguide/what-is-sms-mms.html", "llmsTxt": "https://docs.aws.amazon.com/sms-voice/latest/userguide/llms.txt", "capabilities": [ "messaging.sms", "messaging.mms", "messaging.whatsapp", "messaging.rcs", "messaging.verify", "messaging.inbound" ], "tags": [ "hosted", "llms-txt", "typescript", "python", "sms", "whatsapp", "rcs", "enterprise" ], "lastRelease": "2026-10-06", "graded": true, "anchor": { "graded": true, "score": 74.3, "grade": "BB", "agentReady": true, "rank": 64, "ranked": true, "rankOf": 722, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 71, "maintenance": 85, "payments": 30, "reliability": 73, "schema": 88, "security": 88, "transparency": 83 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "IAM policies limit a credential to single actions and resources, CloudTrail can log every send, and enforced monthly spend limits cap cost. New accounts start in a sandbox with a $1 monthly SMS limit and ten verified recipients, production access needs a support case per Region, and the send actions take no idempotency token.", "bestFor": "Teams already on AWS that want SMS, MMS, RCS and WhatsApp under IAM, CloudTrail and per-Region control at carrier-level prices.", "strengths": [ "IAM policies per action and resource with condition keys and temporary credentials, and CloudTrail data events for the send actions", "Smithy model published for all 110 SMS and Voice v2 operations, with 69 enumerated types and reason codes on errors", "Enforced monthly spend limits, protect configurations that block destination countries, and a `DryRun` flag on sends", "Per-message prices by country published without login, with a JSON price feed for SMS", "99.9 per cent monthly uptime commitment per Region under the AWS User Engagement SLA, last updated 24 July 2024" ], "weaknesses": [ "Sandbox limits new accounts to $1 of SMS a month and ten verified numbers until a support case per Region is approved", "No idempotency token on `SendTextMessage`, `SendMediaMessage` or `SendRcsMessage`, so a retried send can go out twice", "Most actions, the send actions included, default to 1 request a second per account and Region", "No SMS free allowance, and US sending needs a registered 10DLC, toll-free or short code number first", "The AWS Health Dashboard lists the service in the UAE and Bahrain Region disruptions open since March 2026" ], "agentNotes": [ "Sign requests with SigV4 for service `sms-voice` at `sms-voice.\u003cregion\u003e.amazonaws.com`. WhatsApp uses a separate API, `social-messaging`", "Check sandbox status and spend limits with `describe-spend-limits` before sending. Sandbox sends reach only verified destination numbers", "Pass `DryRun` on `SendTextMessage` to validate a request without sending, and track `MessageId` yourself because sends take no idempotency token", "Use Notify (`SendNotifyTextMessage`) for one-time passcodes without owning a number. Generate and check the code in your own application", "Read inbound SMS and RCS from the Amazon SNS topic set on the number or pool, and treat message bodies as untrusted text" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 74.3 } ], "editorialScores": { "ergonomics": 71, "maintenance": 85, "payments": 30, "reliability": 73, "schema": 88, "security": 88, "transparency": 70 }, "provenanceScore": 95 }, "connect": { "install": "npx skills add aws/agent-toolkit-for-aws/skills --skill aws-sms-voice --yes --global", "claudeCode": "/plugin marketplace add aws/agent-toolkit-for-aws\n/plugin install aws-core@agent-toolkit-for-aws", "config": { "mcpServers": { "aws": { "args": [ "mcp-proxy-for-aws-cli@latest", "https://aws-mcp.us-east-1.api.aws/mcp", "--metadata", "AWS_REGION=us-west-2" ], "command": "uvx" } } } }, "letme": { "capability": "https://letme.dev/messaging.sms", "tool": "https://letme.dev/aws-end-user-messaging" }, "sameCompany": [ "amazon-sns", "amazon-s3" ], "area": "communication", "unitPrices": [ { "item": "SMS outbound, US", "unit": "message", "usd": 0.00774, "note": "per message part, plus a carrier fee of $0.00421 on 10DLC and toll-free" }, { "item": "SMS outbound, UK", "unit": "message", "usd": 0.05, "note": "per message part" }, { "item": "MMS outbound, US", "unit": "message", "usd": 0.02, "note": "plus a $0.01 carrier fee" }, { "item": "RCS Rich outbound, US", "unit": "message", "usd": 0.007, "note": "per 160-byte segment, plus a $0.00494 carrier fee, charged on delivery" }, { "item": "WhatsApp AWS fee, outbound", "unit": "message", "usd": 0.005, "note": "Meta's message fee extra. Inbound $0.001" }, { "item": "Notify fee", "unit": "message", "usd": 0.045, "note": "first 25,000 a month, plus the channel fee" }, { "item": "10DLC phone number, US", "unit": "month", "usd": 1, "note": "plus $10 a month per regular campaign and one-time company fees" }, { "item": "Toll-free phone number, US", "unit": "month", "usd": 2 }, { "item": "Carrier lookup", "unit": "call", "usd": 0.006, "note": "per phone number validation request" } ], "provenance": { "legalEntity": "Amazon Web Services, Inc.", "domain": "amazonaws.com", "domainRegistered": "2005-08-18", "endpointOnVendorDomain": true, "terms": "https://aws.amazon.com/agreement/", "privacy": "https://aws.amazon.com/privacy/", "statusPage": "https://health.aws.amazon.com/health/status", "changelog": "https://docs.aws.amazon.com/sms-voice/latest/userguide/doc-history.html", "securityTxt": "expired", "checked": "2026-10-08", "notes": [ "The AWS Customer Agreement (last updated 14 August 2026) names Amazon Web Services, Inc., 410 Terry Avenue North, Seattle, as the contracting party for countries not listed in its table, with other AWS entities by account country.", "Section 29 of the AWS Service Terms (last updated 1 October 2026) adds terms for Amazon Pinpoint and AWS End User Messaging, and says AMCS LLC sells parts of the service in Japan and AMCS SG Private Limited in Singapore (https://aws.amazon.com/service-terms/).", "The AWS Privacy Notice (last updated 18 May 2026) says it does not apply to content customers process with AWS services, which the agreement governs.", "https://aws.amazon.com/.well-known/security.txt carries Expires 2026-09-24T16:25:03Z, so it had expired on 8 October 2026.", "RDAP for amazonaws.com gives a registration date of 2005-08-18. The API answers at sms-voice.\u003cregion\u003e.amazonaws.com, while product and legal pages sit on aws.amazon.com." ], "score": 95 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/aws-end-user-messaging.json", "live": { "slug": "aws-end-user-messaging", "probe": { "target": "https://sms-voice.us-east-1.amazonaws.com", "method": "get", "lastAt": "2026-10-08T21:12:04.571752415Z", "lastOk": true, "lastStatus": 404, "lastMs": 251, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 257, "p95ms24h": 291, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "updatedAt": "2026-10-08T21:12:04.571752415Z" } }, "answer": "AWS End User Messaging and Telnyx API + MCP score within a point of each other on agent readiness, 74.3 (BB) and 73.6 (BB). Telnyx API + MCP leads on reliability, schema \u0026 documentation, agent ergonomics and payments \u0026 pricing.", "b": { "slug": "telnyx", "name": "Telnyx API + MCP", "vendor": "Telnyx", "vendorUrl": "https://telnyx.com", "kind": "http-api", "category": "messaging", "summary": "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.", "url": "https://www.anchorterminal.com/tools/telnyx", "markdownUrl": "https://www.anchorterminal.com/tools/telnyx.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/telnyx.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/telnyx.json", "repo": "https://github.com/team-telnyx/telnyx-node", "license": "MIT", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://api.telnyx.com/v2", "packages": [ { "registry": "npm", "name": "telnyx" }, { "registry": "npm", "name": "telnyx-mcp" }, { "registry": "pypi", "name": "telnyx" } ], "auth": "api-key", "authNotes": "Bearer API key from the portal for both the REST API and the hosted MCP endpoint. Claude custom connectors can instead grant access through the Telnyx portal. Webhooks are signed.", "pricing": "usage", "pricingNotes": "Pay as you go with no minimum and no free credit. Fund by card, or by x402 (USDC on Base), MPP or ACP top-ups through the API. US SMS per part, outbound or inbound, $0.004 on long code, $0.0055 on toll-free and $0.007 on short code, plus carrier passthrough fees ($0.0035 AT\u0026T, $0.0045 Verizon and T-Mobile). US MMS $0.015 a part outbound and $0.005 inbound on long code. Numbers $1 a month. WhatsApp adds a $0.004 platform fee a message on top of Meta's rate card. 10DLC brand registration $4.50 and campaign $10 a month. Committed plans start at $500 a month (https://telnyx.com/pricing/messaging, https://telnyx.com/agent-signup.md).", "priceSummary": "Pay per use", "where": "both", "x402": { "level": "partial", "evidence": "Telnyx's agent signup guide documents POST https://api.telnyx.com/v2/x402/credit_account to top up account credit in USDC on Base, alongside MPP at /v2/machine-payments/account-credit and ACP checkout sessions. These are account top-ups, not per-message payments on the messaging endpoints, and per-payment limits aren't published. Not tested by us (https://telnyx.com/agent-signup.md, checked 2026-10-01).", "endpoints": [ { "url": "https://api.telnyx.com/v2/x402/credit_account", "priceUsd": null, "network": "eip155:8453" } ] }, "toolCount": 3, "popularity": { "githubStars": 197, "npmWeekly": 416629, "pypiWeekly": 178817, "asOf": "2026-09-30" }, "docsUrl": "https://developers.telnyx.com", "llmsTxt": "https://developers.telnyx.com/llms.txt", "openapi": "https://raw.githubusercontent.com/team-telnyx/openapi/master/openapi/spec3.json", "registryName": "io.github.team-telnyx/telnyx", "capabilities": [ "messaging.sms", "messaging.mms", "messaging.rcs", "messaging.whatsapp", "messaging.voice", "messaging.verify", "messaging.inbound" ], "tags": [ "hosted", "mcp", "llms-txt", "openapi", "typescript", "python", "webhooks", "sms", "whatsapp", "x402", "stablecoin", "prepaid" ], "lastRelease": "2026-09-25", "graded": true, "anchor": { "graded": true, "score": 73.6, "grade": "BB", "agentReady": true, "rank": 76, "ranked": true, "rankOf": 722, "categoryRank": 4, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 80, "maintenance": 83, "payments": 65, "reliability": 80, "schema": 93, "security": 45, "transparency": 71 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation.", "bestFor": "Cost-sensitive US SMS and for agents that must onboard and pay without a person.", "strengths": [ "US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md", "Agent signup and x402 or MPP top-ups with no browser", "429 responses carry Retry-After and x-ratelimit headers, with documented backoff guidance", "Hosted MCP with 3 meta-tools that load endpoint schemas on demand", "19 telnyx-node releases in 90 days, the latest v7.24.0 on 2026-09-25" ], "weaknesses": [ "No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation", "No free credit, a new account starts at zero", "API-wide 5XX errors for about 2 hours on 2026-09-23, plus messaging latency and delivery incidents through September", "x402 and MPP only top up account credit, they don't pay per message", "No security.txt or bug bounty found" ], "agentNotes": [ "Register the 10DLC brand ($4.50) and campaign ($10 a month) before sending US long code traffic", "Back off on error 10011 for as long as the Retry-After header says", "Call get_api_endpoint_schema before invoke_api_endpoint, the schemas aren't in the tool list", "Give each agent its own key, since keys can't be scoped", "Verify the signature on inbound message webhooks before acting on the text" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "BB", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 73.6 } ], "editorialScores": { "ergonomics": 80, "maintenance": 83, "payments": 65, "reliability": 80, "schema": 93, "security": 45, "transparency": 55 }, "provenanceScore": 87 }, "connect": { "http": "curl -X POST https://api.telnyx.com/v2/messages -H \"Authorization: Bearer $TELNYX_API_KEY\" \\\n -H \"Content-Type: application/json\" -d '{\"from\":\"+15551234567\",\"to\":\"+15559876543\",\"text\":\"Hello from Telnyx\"}'", "claudeCode": "claude mcp add --transport http telnyx https://api.telnyx.com/v2/mcp --header \"Authorization: Bearer $TELNYX_API_KEY\"", "config": { "mcpServers": { "telnyx": { "args": [ "-y", "telnyx-mcp" ], "command": "npx", "env": { "TELNYX_API_KEY": "${TELNYX_API_KEY}" } } } } }, "letme": { "capability": "https://letme.dev/messaging.sms", "tool": "https://letme.dev/telnyx" }, "sameCompany": [ "telnyx-voice" ], "area": "communication", "unitPrices": [ { "item": "SMS outbound, US long code", "unit": "message", "usd": 0.004, "note": "US, per part, carrier fees extra, tiered down at 100M parts" }, { "item": "SMS outbound, UK", "unit": "message", "usd": 0.05, "note": "UK, per part" }, { "item": "MMS outbound, US long code", "unit": "message", "usd": 0.015, "note": "US, per part, carrier fees extra" }, { "item": "WhatsApp platform fee", "unit": "message", "usd": 0.004, "note": "on top of Meta's per-message rate" } ], "provenance": { "legalEntity": "Telnyx LLC", "domain": "telnyx.com", "domainRegistered": "2009-05-04", "endpointOnVendorDomain": true, "terms": "https://telnyx.com/terms-and-conditions-of-service", "privacy": "https://telnyx.com/privacy-policy", "statusPage": "https://status.telnyx.com", "changelog": "https://telnyx.com/release-notes", "securityTxt": "none", "checked": "2026-09-30", "score": 87 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/telnyx.json", "live": { "slug": "telnyx", "probe": { "target": "https://api.telnyx.com/v2", "method": "get", "lastAt": "2026-10-08T21:12:23.351889574Z", "lastOk": true, "lastStatus": 404, "lastMs": 109, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 109, "p95ms24h": 161, "samples24h": 271, "samples30d": 2157, "days": [ { "date": "2026-09-30", "probes": 35, "ok": 35 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 239, "ok": 239 } ] }, "vendorStatus": { "page": "https://status.telnyx.com", "indicator": "maintenance", "summary": "Under Maintenance", "checkedAt": "2026-10-08T21:06:28.031751183Z" }, "versions": [ { "registry": "github", "name": "team-telnyx/telnyx-node", "version": "v7.25.0", "released": "2026-10-06", "seenAt": "2026-10-08T16:31:45.759431571Z" }, { "registry": "mcp-registry", "name": "io.github.team-telnyx/telnyx", "version": "6.29.3", "seenAt": "2026-10-08T02:42:52.272076636Z" }, { "registry": "npm", "name": "telnyx", "version": "7.25.0", "seenAt": "2026-10-08T16:31:43.617853739Z" }, { "registry": "npm", "name": "telnyx-mcp", "version": "7.25.0", "seenAt": "2026-10-08T16:31:43.679534048Z" }, { "registry": "pypi", "name": "telnyx", "version": "4.184.0", "released": "2026-10-07", "seenAt": "2026-10-08T16:31:45.642105522Z" } ], "githubStars": 197, "npmWeekly": 487202, "pypiWeekly": 211921, "securityTxt": { "url": "https://telnyx.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:39:09.162828278Z" }, "llmsTxt": { "url": "https://developers.telnyx.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:58.450746322Z" }, "domain": { "domain": "telnyx.com", "registered": "2009-05-04", "source": "https://rdap.verisign.com/com/v1/domain/telnyx.com", "checkedAt": "2026-10-04T13:09:33.721251862Z" }, "pages": [ { "url": "https://telnyx.com/pricing/messaging", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:25:10.028419665Z", "changedAt": "2026-10-08T18:25:10.028419665Z", "fingerprint": "901908e4ff6f" } ], "updatedAt": "2026-10-08T21:12:23.351889574Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Amazon Web Services", "b": "Telnyx", "name": "Vendor" }, { "a": "https://sms-voice.us-east-1.amazonaws.com", "b": "https://api.telnyx.com/v2", "name": "Hosted endpoint" }, { "a": "HTTP", "b": "HTTP, Streamable HTTP, stdio", "name": "Transports" }, { "a": "OAuth or key", "b": "API key", "name": "Auth" }, { "a": "Pay per use", "b": "Pay per use", "name": "Pricing" }, { "a": "$0.0077 per message", "b": "$0.004 per message", "name": "Price for messaging sms" }, { "a": "no", "b": "payer tooling only", "name": "x402" }, { "a": "Proprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0", "b": "MIT", "name": "Licence" }, { "a": "none", "b": "3", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "not listed", "b": "io.github.team-telnyx/telnyx", "name": "MCP registry" }, { "a": "2026-10-06", "b": "2026-09-25", "name": "Last release" }, { "a": "2026-08-14", "b": "no date given", "name": "Terms last updated" }, { "a": "2026-05-18", "b": "2026-03-01", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "407k npm/wk", "b": "197 stars, 417k npm/wk, 179k PyPI/wk", "name": "Popularity" }, { "a": "none", "b": "3.5/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "AWS End User Messaging and Telnyx API + MCP score within a point of each other on agent readiness, 74.3 (BB) and 73.6 (BB). Telnyx API + MCP leads on reliability, schema \u0026 documentation, agent ergonomics and payments \u0026 pricing.", "question": "Which is better for AI agents, AWS End User Messaging or Telnyx API + MCP?" }, { "answer": "Telnyx API + MCP, at $0.004 per message against $0.0077 per message for AWS End User Messaging. These are the vendors' published prices for the job.", "question": "Which is cheaper for messaging sms, AWS End User Messaging or Telnyx API + MCP?" }, { "answer": "AWS End User Messaging takes an API key or an OAuth sign-in. Telnyx API + MCP needs an API key.", "question": "Do AWS End User Messaging and Telnyx API + MCP need an API key?" }, { "answer": "Yes. AWS End User Messaging has a hosted endpoint at https://sms-voice.us-east-1.amazonaws.com and Telnyx API + MCP at https://api.telnyx.com/v2.", "question": "Can an agent call AWS End User Messaging and Telnyx API + MCP without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Security \u0026 auth, 88 against 45", "Transparency \u0026 trust, 83 against 71" ], "also": null, "goodFor": "Teams already on AWS that want SMS, MMS, RCS and WhatsApp under IAM, CloudTrail and per-Region control at carrier-level prices.", "slug": "aws-end-user-messaging", "watchFor": "Sandbox limits new accounts to $1 of SMS a month and ten verified numbers until a support case per Region is approved" }, { "aheadOn": [ "Reliability, 80 against 73", "Schema \u0026 documentation, 93 against 88", "Agent ergonomics, 80 against 71", "Payments \u0026 pricing, 65 against 30" ], "also": [ "Cheaper for messaging sms, $0.004 against $0.0077 per message", "Runs on your own machine" ], "goodFor": "Cost-sensitive US SMS and for agents that must onboard and pay without a person.", "slug": "telnyx", "watchFor": "No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation" } ], "job": { "capability": "messaging.sms", "name": "Messaging sms" }, "others": [ { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bandwidth.json", "title": "AWS End User Messaging vs Bandwidth Messaging API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bandwidth" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bird.json", "title": "AWS End User Messaging vs Bird API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bird" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-clicksend.json", "title": "AWS End User Messaging vs ClickSend SMS API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-clicksend" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-infobip.json", "title": "AWS End User Messaging vs Infobip API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-infobip" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-plivo.json", "title": "AWS End User Messaging vs Plivo API", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-plivo" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sendblue.json", "title": "AWS End User Messaging vs Sendblue", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sendblue" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sinch.json", "title": "AWS End User Messaging vs Sinch Messaging APIs + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sinch" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-twilio.json", "title": "AWS End User Messaging vs Twilio API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-twilio" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-vonage.json", "title": "AWS End User Messaging vs Vonage Messages API + MCP", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-vonage" }, { "json": "https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.json", "title": "Bandwidth Messaging API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/bandwidth-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/bird-vs-telnyx.json", "title": "Bird API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/bird-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/clicksend-vs-telnyx.json", "title": "ClickSend SMS API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/clicksend-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/infobip-vs-telnyx.json", "title": "Infobip API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/infobip-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/plivo-vs-telnyx.json", "title": "Plivo API vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/plivo-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx.json", "title": "Sendblue vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/sendblue-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/sinch-vs-telnyx.json", "title": "Sinch Messaging APIs + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/sinch-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/telnyx-vs-twilio.json", "title": "Telnyx API + MCP vs Twilio API + MCP", "url": "https://www.anchorterminal.com/compare/telnyx-vs-twilio" }, { "json": "https://www.anchorterminal.com/compare/telnyx-vs-vonage.json", "title": "Telnyx API + MCP vs Vonage Messages API + MCP", "url": "https://www.anchorterminal.com/compare/telnyx-vs-vonage" }, { "json": "https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.json", "title": "360dialog WhatsApp API + MCP vs AWS End User Messaging", "url": "https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging" }, { "json": "https://www.anchorterminal.com/compare/360dialog-vs-telnyx.json", "title": "360dialog WhatsApp API + MCP vs Telnyx API + MCP", "url": "https://www.anchorterminal.com/compare/360dialog-vs-telnyx" }, { "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-whatsapp-cloud-api.json", "title": "AWS End User Messaging vs WhatsApp Business Platform (Cloud API)", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-whatsapp-cloud-api" }, { "json": "https://www.anchorterminal.com/compare/telnyx-vs-whatsapp-cloud-api.json", "title": "Telnyx API + MCP vs WhatsApp Business Platform (Cloud API)", "url": "https://www.anchorterminal.com/compare/telnyx-vs-whatsapp-cloud-api" } ], "scores": [ { "aws-end-user-messaging": 73, "by": 7, "edge": "telnyx", "key": "reliability", "name": "Reliability", "telnyx": 80, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "aws-end-user-messaging": 88, "by": 5, "edge": "telnyx", "key": "schema", "name": "Schema \u0026 documentation", "telnyx": 93, "weight": 13 }, { "aws-end-user-messaging": 71, "by": 9, "edge": "telnyx", "key": "ergonomics", "name": "Agent ergonomics", "telnyx": 80, "weight": 13 }, { "aws-end-user-messaging": 88, "by": 43, "edge": "aws-end-user-messaging", "key": "security", "name": "Security \u0026 auth", "telnyx": 45, "weight": 14 }, { "aws-end-user-messaging": 30, "by": 35, "edge": "telnyx", "key": "payments", "name": "Payments \u0026 pricing", "telnyx": 65, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "aws-end-user-messaging": 85, "by": 2, "edge": "aws-end-user-messaging", "key": "maintenance", "name": "Maintenance \u0026 community", "telnyx": 83, "weight": 7 }, { "aws-end-user-messaging": 83, "by": 12, "edge": "aws-end-user-messaging", "key": "transparency", "name": "Transparency \u0026 trust", "telnyx": 71, "weight": 7 } ], "summary": "AWS End User Messaging and Telnyx API + MCP score within a point of each other on agent readiness, 74.3 (BB) and 73.6 (BB). Telnyx API + MCP leads on reliability, schema \u0026 documentation, agent ergonomics and payments \u0026 pricing. Both do messaging sms. Telnyx API + MCP is cheaper for messaging sms, $0.004 against $0.0077 per message.", "verdicts": { "aws-end-user-messaging": "IAM policies limit a credential to single actions and resources, CloudTrail can log every send, and enforced monthly spend limits cap cost. New accounts start in a sandbox with a $1 monthly SMS limit and ten verified recipients, production access needs a support case per Region, and the send actions take no idempotency token.", "telnyx": "US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx", "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.md", "slim": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.min.md" }, "markdown": "AWS End User Messaging and Telnyx API + MCP score within a point of each other on agent readiness, 74.3 (BB) and 73.6 (BB). Telnyx API + MCP leads on reliability, schema \u0026 documentation, agent ergonomics and payments \u0026 pricing. Both do messaging sms. Telnyx API + MCP is cheaper for messaging sms, $0.004 against $0.0077 per message.\n\n- AWS End User Messaging: grade BB, 74.3/100, rank #64 of 722. Markdown https://www.anchorterminal.com/tools/aws-end-user-messaging.md · JSON https://www.anchorterminal.com/api/v1/tools/aws-end-user-messaging.json\n- Telnyx API + MCP: grade BB, 73.6/100, rank #76 of 722. Markdown https://www.anchorterminal.com/tools/telnyx.md · JSON https://www.anchorterminal.com/api/v1/tools/telnyx.json\n\n## Which one, for what\n\n### AWS End User Messaging (BB)\n\nGood for: Teams already on AWS that want SMS, MMS, RCS and WhatsApp under IAM, CloudTrail and per-Region control at carrier-level prices.\n\nAhead on:\n- Security \u0026 auth, 88 against 45\n- Transparency \u0026 trust, 83 against 71\n\nWatch for: Sandbox limits new accounts to $1 of SMS a month and ten verified numbers until a support case per Region is approved\n\n### Telnyx API + MCP (BB)\n\nGood for: Cost-sensitive US SMS and for agents that must onboard and pay without a person.\n\nAhead on:\n- Reliability, 80 against 73\n- Schema \u0026 documentation, 93 against 88\n- Agent ergonomics, 80 against 71\n- Payments \u0026 pricing, 65 against 30\n\nAlso in its favour:\n- Cheaper for messaging sms, $0.004 against $0.0077 per message\n- Runs on your own machine\n\nWatch for: No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation\n\n\n## Score by category\n\n| Category | Weight | AWS End User Messaging | Telnyx API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 73 | 80 | Telnyx API + MCP +7 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 88 | 93 | Telnyx API + MCP +5 |\n| Agent ergonomics | 13% (16.2 this run) | 71 | 80 | Telnyx API + MCP +9 |\n| Security \u0026 auth | 14% (17.5 this run) | 88 | 45 | AWS End User Messaging +43 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 65 | Telnyx API + MCP +35 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 83 | AWS End User Messaging +2 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 83 | 71 | AWS End User Messaging +12 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **74.3 · BB** | **73.6 · BB** | |\n\n## Facts side by side\n\n| Fact | AWS End User Messaging | Telnyx API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Amazon Web Services | Telnyx |\n| Hosted endpoint | `https://sms-voice.us-east-1.amazonaws.com` | `https://api.telnyx.com/v2` |\n| Transports | HTTP | HTTP, Streamable HTTP, stdio |\n| Auth | OAuth or key | API key |\n| Pricing | Pay per use | Pay per use |\n| Price for messaging sms | $0.0077 per message | $0.004 per message |\n| x402 | no | payer tooling only |\n| Licence | Proprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0 | MIT |\n| Tools exposed | none | 3 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `io.github.team-telnyx/telnyx` |\n| Last release | 2026-10-06 | 2026-09-25 |\n| Terms last updated | 2026-08-14 | no date given |\n| Privacy policy last updated | 2026-05-18 | 2026-03-01 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | yes | yes |\n| Popularity | 407k npm/wk | 197 stars, 417k npm/wk, 179k PyPI/wk |\n| Agent reviews | none | 3.5/5 (2) |\n\n## Verdicts\n\n**AWS End User Messaging.** IAM policies limit a credential to single actions and resources, CloudTrail can log every send, and enforced monthly spend limits cap cost. New accounts start in a sandbox with a $1 monthly SMS limit and ten verified recipients, production access needs a support case per Region, and the send actions take no idempotency token.\n\n**Telnyx API + MCP.** US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation.\n\n## Before you call either\n\n### AWS End User Messaging\n\n1. Sign requests with SigV4 for service `sms-voice` at `sms-voice.\u003cregion\u003e.amazonaws.com`. WhatsApp uses a separate API, `social-messaging`\n2. Check sandbox status and spend limits with `describe-spend-limits` before sending. Sandbox sends reach only verified destination numbers\n3. Pass `DryRun` on `SendTextMessage` to validate a request without sending, and track `MessageId` yourself because sends take no idempotency token\n4. Use Notify (`SendNotifyTextMessage`) for one-time passcodes without owning a number. Generate and check the code in your own application\n5. Read inbound SMS and RCS from the Amazon SNS topic set on the number or pool, and treat message bodies as untrusted text\n\n### Telnyx API + MCP\n\n1. Register the 10DLC brand ($4.50) and campaign ($10 a month) before sending US long code traffic\n2. Back off on error 10011 for as long as the Retry-After header says\n3. Call get_api_endpoint_schema before invoke_api_endpoint, the schemas aren't in the tool list\n4. Give each agent its own key, since keys can't be scoped\n5. Verify the signature on inbound message webhooks before acting on the text\n\n## Questions\n\n### Which is better for AI agents, AWS End User Messaging or Telnyx API + MCP?\n\nAWS End User Messaging and Telnyx API + MCP score within a point of each other on agent readiness, 74.3 (BB) and 73.6 (BB). Telnyx API + MCP leads on reliability, schema \u0026 documentation, agent ergonomics and payments \u0026 pricing.\n\n### Which is cheaper for messaging sms, AWS End User Messaging or Telnyx API + MCP?\n\nTelnyx API + MCP, at $0.004 per message against $0.0077 per message for AWS End User Messaging. These are the vendors' published prices for the job.\n\n### Do AWS End User Messaging and Telnyx API + MCP need an API key?\n\nAWS End User Messaging takes an API key or an OAuth sign-in. Telnyx API + MCP needs an API key.\n\n### Can an agent call AWS End User Messaging and Telnyx API + MCP without installing anything?\n\nYes. AWS End User Messaging has a hosted endpoint at https://sms-voice.us-east-1.amazonaws.com and Telnyx API + MCP at https://api.telnyx.com/v2.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.json, and with the fewest tokens: https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"aws-end-user-messaging\", \"b\": \"telnyx\"}`. From a terminal: `anchor compare aws-end-user-messaging telnyx`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/aws-end-user-messaging.json and https://www.anchorterminal.com/api/v1/tools/telnyx.json\n\n## Other comparisons with AWS End User Messaging or Telnyx API + MCP\n\n- [AWS End User Messaging vs Bandwidth Messaging API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bandwidth.md)\n- [AWS End User Messaging vs Bird API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bird.md)\n- [AWS End User Messaging vs ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-clicksend.md)\n- [AWS End User Messaging vs Infobip API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-infobip.md)\n- [AWS End User Messaging vs Plivo API](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-plivo.md)\n- [AWS End User Messaging vs Sendblue](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sendblue.md)\n- [AWS End User Messaging vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sinch.md)\n- [AWS End User Messaging vs Twilio API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-twilio.md)\n- [AWS End User Messaging vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-vonage.md)\n- [Bandwidth Messaging API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.md)\n- [Bird API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/bird-vs-telnyx.md)\n- [ClickSend SMS API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-telnyx.md)\n- [Infobip API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/infobip-vs-telnyx.md)\n- [Plivo API vs Telnyx API + MCP](https://www.anchorterminal.com/compare/plivo-vs-telnyx.md)\n- [Sendblue vs Telnyx API + MCP](https://www.anchorterminal.com/compare/sendblue-vs-telnyx.md)\n- [Sinch Messaging APIs + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/sinch-vs-telnyx.md)\n- [Telnyx API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/telnyx-vs-twilio.md)\n- [Telnyx API + MCP vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/telnyx-vs-vonage.md)\n- [360dialog WhatsApp API + MCP vs AWS End User Messaging](https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.md)\n- [360dialog WhatsApp API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-telnyx.md)\n- [AWS End User Messaging vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-whatsapp-cloud-api.md)\n- [Telnyx API + MCP vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/telnyx-vs-whatsapp-cloud-api.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "AWS End User Messaging vs Telnyx API + MCP", "url": "" } ], "description": "AWS End User Messaging and Telnyx API + MCP score within a point of each other on agent readiness, 74.3 (BB) and 73.6 (BB). Telnyx API + MCP leads on reliability, schema \u0026 documentation, agent ergonomics and payments \u0026 pricing. Both do messaging sms. Telnyx API + MCP is cheaper…", "facts": [ "AWS End User Messaging BB 74.3", "Telnyx API + MCP BB 73.6", "scores" ], "h1": "AWS End User Messaging vs Telnyx API + MCP", "image": "https://www.anchorterminal.com/assets/og/compare-aws-end-user-messaging-vs-telnyx.png", "path": "/compare/aws-end-user-messaging-vs-telnyx", "published": "2026-10-01", "section": "tools", "title": "AWS End User Messaging vs Telnyx API + MCP for AI agents", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx" }, "tokens": { "markdown": 2650, "slim": 730 }, "version": 1 }