{
  "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 scores 74.3 (BB) on agent readiness against ClickSend SMS API + MCP's 47.7 (D), and leads in 6 of 7 scored categories.",
    "b": {
      "slug": "clicksend",
      "name": "ClickSend SMS API + MCP",
      "vendor": "ClickSend (Sinch)",
      "vendorUrl": "https://www.clicksend.com",
      "kind": "http-api",
      "category": "messaging",
      "summary": "Prepaid SMS and MMS API aimed at small businesses, part of Sinch, with RCS, voice, email and post on the same account.",
      "url": "https://www.anchorterminal.com/tools/clicksend",
      "markdownUrl": "https://www.anchorterminal.com/tools/clicksend.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/clicksend.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/clicksend.json",
      "repo": "https://github.com/ClickSend/clicksend-mcp-server",
      "license": "MIT",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://rest.clicksend.com/v3",
      "packages": [
        {
          "registry": "npm",
          "name": "@clicksend/clicksend-mcp-server"
        },
        {
          "registry": "npm",
          "name": "clicksend"
        },
        {
          "registry": "pypi",
          "name": "clicksend-client"
        }
      ],
      "auth": "api-key",
      "authNotes": "HTTP Basic auth with the account username and an API key. The MCP server reads CLICKSEND_USERNAME and CLICKSEND_API_KEY from the environment.",
      "pricing": "usage",
      "pricingNotes": "Prepaid credit, minimum top-up $20, no subscription. US SMS $0.0289 a message at the lowest tier down to $0.0095 at the highest, plus a $0.0041 carrier fee. US MMS $0.0374 plus $0.0087. Dedicated US number $3.53 a month. Inbound replies are free. UK SMS from $0.0569 (https://www.clicksend.com/us/pricing/us/).",
      "priceSummary": "$3.53 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 or stablecoin payment path in docs, pricing or agent discovery files (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 6,
      "popularity": {
        "githubStars": 3,
        "npmWeekly": 3710,
        "pypiWeekly": 7690,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developers.clicksend.com/docs/",
      "llmsTxt": "https://developers.clicksend.com/llms.txt",
      "registryName": "com.clicksend/clicksend-mcp-server",
      "capabilities": [
        "messaging.sms",
        "messaging.mms",
        "messaging.rcs",
        "messaging.voice",
        "messaging.inbound"
      ],
      "tags": [
        "hosted",
        "mcp",
        "llms-txt",
        "typescript",
        "python",
        "webhooks",
        "sms"
      ],
      "lastRelease": "2026-09-25",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 47.7,
        "grade": "D",
        "agentReady": false,
        "rank": 629,
        "ranked": true,
        "rankOf": 722,
        "categoryRank": 13,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 70,
          "maintenance": 62,
          "payments": 30,
          "reliability": 65,
          "schema": 52,
          "security": 23,
          "transparency": 53
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -3,
        "negativeNotes": [
          "Since 2025-05-16 the official MCP server has logged each request's options to stderr, including the Basic `Authorization` header that encodes the username and API key, along with every request and response body. The published 2026.8.23 package was built from that code. The credential stays in local log files rather than leaving the machine, so -3 (https://github.com/ClickSend/clicksend-mcp-server/blob/main/src/helper/clicksend.ts)."
        ],
        "verdict": "A keyless pricing endpoint returns per-country, per-tier SMS and MMS prices. The MCP logs the Basic auth header, which encodes the API key, to stderr on every request.",
        "bestFor": "Small businesses and simple agents that send SMS in a few countries and want prices up front.",
        "strengths": [
          "A keyless pricing endpoint returns per-country, per-tier SMS and MMS prices",
          "Six MCP tools, including a price check before a send",
          "Inbound replies are free",
          "The MCP turns natural-language dates into history filters",
          "No SMS or API incidents on the status page in the last 90 days"
        ],
        "weaknesses": [
          "The MCP logs the Basic auth header, which encodes the API key, to stderr on every request",
          "One API key per account or subaccount, with no scopes or read-only mode",
          "No rate limits, Retry-After or idempotency key documented",
          "US SMS at $0.0289 a message on the entry tier, falling to $0.0095 only on the top tier",
          "No public OpenAPI spec or changelog, and the privacy policy dates from September 2023"
        ],
        "agentNotes": [
          "Call calculate-sms-price before a bulk send, the pricing endpoint needs no key",
          "Pass the user's own date words in user_date_request when reading SMS history",
          "Use a subaccount key for the agent, not the main account key",
          "Restrict access to the MCP host's log files, they contain the encoded API key",
          "Leave links out of messages, ClickSend pauses SMS with URLs for new customers"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 47.7
          }
        ],
        "editorialScores": {
          "ergonomics": 70,
          "maintenance": 62,
          "payments": 30,
          "reliability": 65,
          "schema": 52,
          "security": 23,
          "transparency": 30
        },
        "provenanceScore": 76
      },
      "connect": {
        "http": "curl -X POST https://rest.clicksend.com/v3/sms/send -u \"$CLICKSEND_USERNAME:$CLICKSEND_API_KEY\" \\\n  -H \"Content-Type: application/json\" -d '{\"messages\":[{\"source\":\"curl\",\"to\":\"+15555550123\",\"body\":\"Hello from ClickSend\"}]}'",
        "claudeCode": "claude mcp add clicksend -e CLICKSEND_USERNAME=$CLICKSEND_USERNAME -e CLICKSEND_API_KEY=$CLICKSEND_API_KEY -- npx -y @clicksend/clicksend-mcp-server@latest",
        "config": {
          "mcpServers": {
            "clicksend": {
              "args": [
                "-y",
                "@clicksend/clicksend-mcp-server@latest"
              ],
              "command": "npx",
              "env": {
                "CLICKSEND_API_KEY": "${CLICKSEND_API_KEY}",
                "CLICKSEND_USERNAME": "${CLICKSEND_USERNAME}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/messaging.sms",
        "tool": "https://letme.dev/clicksend"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "SMS, US",
          "unit": "message",
          "usd": 0.0289,
          "note": "US, entry tier, plus $0.0041 carrier fee, falls to $0.0095 at the top tier"
        },
        {
          "item": "SMS, UK",
          "unit": "message",
          "usd": 0.0569,
          "note": "UK, entry tier, falls to $0.0417"
        },
        {
          "item": "MMS, US",
          "unit": "message",
          "usd": 0.0374,
          "note": "US, plus $0.0087 carrier fee"
        },
        {
          "item": "Dedicated US number",
          "unit": "month",
          "usd": 3.53
        }
      ],
      "provenance": {
        "legalEntity": "ClickSend Pty Ltd",
        "domain": "clicksend.com",
        "domainRegistered": "2003-07-05",
        "endpointOnVendorDomain": true,
        "terms": "https://www.clicksend.com/us/legal/terms-of-service/",
        "privacy": "https://www.clicksend.com/us/legal/privacy-policy/",
        "statusPage": "https://status.clicksend.com",
        "changelog": "",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Owned by Sinch. The privacy contact is a sinch.com address."
        ],
        "score": 76
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/clicksend.json",
      "live": {
        "slug": "clicksend",
        "probe": {
          "target": "https://rest.clicksend.com/v3",
          "method": "get",
          "lastAt": "2026-10-08T21:12:07.459364124Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 333,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 346,
          "p95ms24h": 419,
          "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.clicksend.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T21:05:53.980593137Z"
        },
        "versions": [
          {
            "registry": "mcp-registry",
            "name": "com.clicksend/clicksend-mcp-server",
            "version": "2026.8.23",
            "seenAt": "2026-10-08T02:42:52.272076636Z"
          },
          {
            "registry": "npm",
            "name": "@clicksend/clicksend-mcp-server",
            "version": "2026.8.23",
            "seenAt": "2026-10-08T16:05:30.836297802Z"
          },
          {
            "registry": "npm",
            "name": "clicksend",
            "version": "7.0.0",
            "seenAt": "2026-10-08T16:05:33.131490331Z"
          },
          {
            "registry": "pypi",
            "name": "clicksend-client",
            "version": "6.0.2",
            "released": "2026-09-25",
            "seenAt": "2026-10-08T16:05:33.405352121Z"
          }
        ],
        "githubStars": 3,
        "npmWeekly": 75,
        "pypiWeekly": 11449,
        "securityTxt": {
          "url": "https://clicksend.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:38:41.073958735Z"
        },
        "llmsTxt": {
          "url": "https://developers.clicksend.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:11.418241586Z"
        },
        "domain": {
          "domain": "clicksend.com",
          "registered": "2003-07-05",
          "source": "https://rdap.verisign.com/com/v1/domain/clicksend.com",
          "checkedAt": "2026-10-04T13:03:55.142150796Z"
        },
        "pages": [
          {
            "url": "https://www.clicksend.com/us/pricing/us/",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:27:09.594521653Z",
            "changedAt": "2026-10-06T16:14:32.399001062Z",
            "fingerprint": "4d3f25a9ad7a"
          },
          {
            "url": "https://www.clicksend.com/us/legal/privacy-policy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:27:03.523139278Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "84bfd5d9bbc2"
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          {
            "url": "https://www.clicksend.com/us/legal/terms-of-service/",
            "kind": "terms",
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            "fingerprint": "6285ba272f13"
          }
        ],
        "updatedAt": "2026-10-08T21:12:07.459364124Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Amazon Web Services",
        "b": "ClickSend (Sinch)",
        "name": "Vendor"
      },
      {
        "a": "https://sms-voice.us-east-1.amazonaws.com",
        "b": "https://rest.clicksend.com/v3",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP",
        "b": "HTTP, stdio",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "API key",
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      {
        "a": "Pay per use",
        "b": "Pay per use",
        "name": "Pricing"
      },
      {
        "a": "$0.0077 per message",
        "b": "$0.0289 per message",
        "name": "Price for messaging sms"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0",
        "b": "MIT",
        "name": "Licence"
      },
      {
        "a": "none",
        "b": "6",
        "name": "Tools exposed"
      },
      {
        "a": "no",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "not listed",
        "b": "com.clicksend/clicksend-mcp-server",
        "name": "MCP registry"
      },
      {
        "a": "2026-10-06",
        "b": "2026-09-25",
        "name": "Last release"
      },
      {
        "a": "2026-08-14",
        "b": "couldn't be read",
        "name": "Terms last updated"
      },
      {
        "a": "2026-05-18",
        "b": "2023-09-01",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not found in the text",
        "b": "couldn't be read",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "couldn't be read",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "407k npm/wk",
        "b": "3 stars, 3.7k npm/wk, 7.7k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "2.5/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "AWS End User Messaging scores 74.3 (BB) on agent readiness against ClickSend SMS API + MCP's 47.7 (D), and leads in 6 of 7 scored categories.",
        "question": "Which is better for AI agents, AWS End User Messaging or ClickSend SMS API + MCP?"
      },
      {
        "answer": "AWS End User Messaging, at $0.0077 per message against $0.0289 per message for ClickSend SMS API + MCP. These are the vendors' published prices for the job.",
        "question": "Which is cheaper for messaging sms, AWS End User Messaging or ClickSend SMS API + MCP?"
      },
      {
        "answer": "AWS End User Messaging takes an API key or an OAuth sign-in. ClickSend SMS API + MCP needs an API key.",
        "question": "Do AWS End User Messaging and ClickSend SMS 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 ClickSend SMS API + MCP at https://rest.clicksend.com/v3.",
        "question": "Can an agent call AWS End User Messaging and ClickSend SMS API + MCP without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 73 against 65",
          "Schema \u0026 documentation, 88 against 52",
          "Security \u0026 auth, 88 against 23",
          "Maintenance \u0026 community, 85 against 62",
          "Transparency \u0026 trust, 83 against 53"
        ],
        "also": [
          "Cheaper for messaging sms, $0.0077 against $0.0289 per message",
          "Agent-ready, a grade of BB or better",
          "No incidents deducted, where ClickSend SMS API + MCP loses 3 points for them"
        ],
        "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": null,
        "also": [
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        ],
        "goodFor": "Small businesses and simple agents that send SMS in a few countries and want prices up front.",
        "slug": "clicksend",
        "watchFor": "The MCP logs the Basic auth header, which encodes the API key, to stderr on every request"
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      "name": "Messaging sms"
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      },
      {
        "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-bird.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-infobip.json",
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      {
        "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-plivo.json",
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      {
        "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sinch.json",
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        "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-sinch"
      },
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        "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.json",
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        "url": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-twilio"
      },
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      },
      {
        "json": "https://www.anchorterminal.com/compare/clicksend-vs-sinch.json",
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      },
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        "url": "https://www.anchorterminal.com/compare/clicksend-vs-telnyx"
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        "json": "https://www.anchorterminal.com/compare/clicksend-vs-twilio.json",
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      },
      {
        "json": "https://www.anchorterminal.com/compare/360dialog-vs-aws-end-user-messaging.json",
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      },
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        "json": "https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-whatsapp-cloud-api.json",
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    "scores": [
      {
        "aws-end-user-messaging": 73,
        "by": 8,
        "clicksend": 65,
        "edge": "aws-end-user-messaging",
        "key": "reliability",
        "name": "Reliability",
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "aws-end-user-messaging": 88,
        "by": 36,
        "clicksend": 52,
        "edge": "aws-end-user-messaging",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "weight": 13
      },
      {
        "aws-end-user-messaging": 71,
        "by": 1,
        "clicksend": 70,
        "edge": "aws-end-user-messaging",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "weight": 13
      },
      {
        "aws-end-user-messaging": 88,
        "by": 65,
        "clicksend": 23,
        "edge": "aws-end-user-messaging",
        "key": "security",
        "name": "Security \u0026 auth",
        "weight": 14
      },
      {
        "aws-end-user-messaging": 30,
        "by": 0,
        "clicksend": 30,
        "edge": "",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "aws-end-user-messaging": 85,
        "by": 23,
        "clicksend": 62,
        "edge": "aws-end-user-messaging",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "weight": 7
      },
      {
        "aws-end-user-messaging": 83,
        "by": 30,
        "clicksend": 53,
        "edge": "aws-end-user-messaging",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "weight": 7
      }
    ],
    "summary": "AWS End User Messaging scores 74.3 (BB) on agent readiness against ClickSend SMS API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Both do messaging sms. AWS End User Messaging is cheaper for messaging sms, $0.0077 against $0.0289 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.",
      "clicksend": "A keyless pricing endpoint returns per-country, per-tier SMS and MMS prices. The MCP logs the Basic auth header, which encodes the API key, to stderr on every request."
    }
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  "links": {
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  "markdown": "AWS End User Messaging scores 74.3 (BB) on agent readiness against ClickSend SMS API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Both do messaging sms. AWS End User Messaging is cheaper for messaging sms, $0.0077 against $0.0289 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- ClickSend SMS API + MCP: grade D, 47.7/100, rank #629 of 722. Markdown https://www.anchorterminal.com/tools/clicksend.md · JSON https://www.anchorterminal.com/api/v1/tools/clicksend.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- Reliability, 73 against 65\n- Schema \u0026 documentation, 88 against 52\n- Security \u0026 auth, 88 against 23\n- Maintenance \u0026 community, 85 against 62\n- Transparency \u0026 trust, 83 against 53\n\nAlso in its favour:\n- Cheaper for messaging sms, $0.0077 against $0.0289 per message\n- Agent-ready, a grade of BB or better\n- No incidents deducted, where ClickSend SMS API + MCP loses 3 points for them\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### ClickSend SMS API + MCP (D)\n\nGood for: Small businesses and simple agents that send SMS in a few countries and want prices up front.\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: The MCP logs the Basic auth header, which encodes the API key, to stderr on every request\n\n\n## Score by category\n\n| Category | Weight | AWS End User Messaging | ClickSend SMS API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 73 | 65 | AWS End User Messaging +8 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 88 | 52 | AWS End User Messaging +36 |\n| Agent ergonomics | 13% (16.2 this run) | 71 | 70 | AWS End User Messaging +1 |\n| Security \u0026 auth | 14% (17.5 this run) | 88 | 23 | AWS End User Messaging +65 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 30 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 62 | AWS End User Messaging +23 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 83 | 53 | AWS End User Messaging +30 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **74.3 · BB** | **47.7 · D** | |\n\n## Facts side by side\n\n| Fact | AWS End User Messaging | ClickSend SMS API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Amazon Web Services | ClickSend (Sinch) |\n| Hosted endpoint | `https://sms-voice.us-east-1.amazonaws.com` | `https://rest.clicksend.com/v3` |\n| Transports | HTTP | 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 | $0.0289 per message |\n| x402 | no | no |\n| Licence | Proprietary service under the AWS Customer Agreement. The AWS SDKs are Apache-2.0 | MIT |\n| Tools exposed | none | 6 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | not listed | `com.clicksend/clicksend-mcp-server` |\n| Last release | 2026-10-06 | 2026-09-25 |\n| Terms last updated | 2026-08-14 | couldn't be read |\n| Privacy policy last updated | 2026-05-18 | 2023-09-01 |\n| Customer content may train models | not found in the text | couldn't be read |\n| Terms restrict automated access | not found in the text | couldn't be read |\n| Terms restrict benchmarking | not found in the text | couldn't be read |\n| Terms or service can change without notice | not found in the text | couldn't be read |\n| Arbitration or class-action waiver | yes | couldn't be read |\n| Popularity | 407k npm/wk | 3 stars, 3.7k npm/wk, 7.7k PyPI/wk |\n| Agent reviews | none | 2.5/5 (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**ClickSend SMS API + MCP.** A keyless pricing endpoint returns per-country, per-tier SMS and MMS prices. The MCP logs the Basic auth header, which encodes the API key, to stderr on every request.\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### ClickSend SMS API + MCP\n\n1. Call calculate-sms-price before a bulk send, the pricing endpoint needs no key\n2. Pass the user's own date words in user_date_request when reading SMS history\n3. Use a subaccount key for the agent, not the main account key\n4. Restrict access to the MCP host's log files, they contain the encoded API key\n5. Leave links out of messages, ClickSend pauses SMS with URLs for new customers\n\n## Questions\n\n### Which is better for AI agents, AWS End User Messaging or ClickSend SMS API + MCP?\n\nAWS End User Messaging scores 74.3 (BB) on agent readiness against ClickSend SMS API + MCP's 47.7 (D), and leads in 6 of 7 scored categories.\n\n### Which is cheaper for messaging sms, AWS End User Messaging or ClickSend SMS API + MCP?\n\nAWS End User Messaging, at $0.0077 per message against $0.0289 per message for ClickSend SMS API + MCP. These are the vendors' published prices for the job.\n\n### Do AWS End User Messaging and ClickSend SMS API + MCP need an API key?\n\nAWS End User Messaging takes an API key or an OAuth sign-in. ClickSend SMS API + MCP needs an API key.\n\n### Can an agent call AWS End User Messaging and ClickSend SMS 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 ClickSend SMS API + MCP at https://rest.clicksend.com/v3.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-clicksend.json, and with the fewest tokens: https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-clicksend.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"aws-end-user-messaging\", \"b\": \"clicksend\"}`. From a terminal: `anchor compare aws-end-user-messaging clicksend`\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/clicksend.json\n\n## Other comparisons with AWS End User Messaging or ClickSend SMS 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 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 Telnyx API + MCP](https://www.anchorterminal.com/compare/aws-end-user-messaging-vs-telnyx.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 ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-clicksend.md)\n- [Bird API + MCP vs ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/bird-vs-clicksend.md)\n- [ClickSend SMS API + MCP vs Infobip API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-infobip.md)\n- [ClickSend SMS API + MCP vs Plivo API](https://www.anchorterminal.com/compare/clicksend-vs-plivo.md)\n- [ClickSend SMS API + MCP vs Sendblue](https://www.anchorterminal.com/compare/clicksend-vs-sendblue.md)\n- [ClickSend SMS API + MCP vs Sinch Messaging APIs + MCP](https://www.anchorterminal.com/compare/clicksend-vs-sinch.md)\n- [ClickSend SMS API + MCP vs Telnyx API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-telnyx.md)\n- [ClickSend SMS API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-twilio.md)\n- [ClickSend SMS API + MCP vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/clicksend-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- [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- [360dialog WhatsApp API + MCP vs ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-clicksend.md)\n- [ClickSend SMS API + MCP vs WhatsApp Business Platform (Cloud API)](https://www.anchorterminal.com/compare/clicksend-vs-whatsapp-cloud-api.md)\n",
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        "name": "AWS End User Messaging vs ClickSend SMS API + MCP",
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    "description": "AWS End User Messaging scores 74.3 (BB) on agent readiness against ClickSend SMS API + MCP's 47.7 (D), and leads in 6 of 7 scored categories. Both do messaging sms. AWS End User Messaging is cheaper for messaging sms, $0.0077 against $0.0289 per message. Category scores, facts…",
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    "published": "2026-10-01",
    "section": "tools",
    "title": "AWS End User Messaging vs ClickSend SMS API + MCP for AI agents",
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    "updated": "2026-10-08",
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