{
  "data": {
    "a": {
      "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": 47.8,
        "grade": "D",
        "agentReady": false,
        "rank": 379,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 10,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 70,
          "maintenance": 62,
          "payments": 30,
          "reliability": 65,
          "schema": 52,
          "security": 23,
          "transparency": 55
        },
        "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.",
        "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 $0.0095 only on the top tier",
          "No public OpenAPI spec or changelog, and the privacy policy dates from September 2023"
        ],
        "agentNotes": [
          "Call calculate-sms-price before a bulk send, the pricing endpoint needs no key",
          "Pass the user's own date words in user_date_request when reading SMS history",
          "Use a subaccount key for the agent, not the main account key",
          "Restrict access to the MCP host's log files, they contain the encoded API key",
          "Leave links out of messages, ClickSend pauses SMS with URLs for new customers"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 2.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 47.8
          }
        ],
        "editorialScores": {
          "ergonomics": 70,
          "maintenance": 62,
          "payments": 30,
          "reliability": 65,
          "schema": 52,
          "security": 23,
          "transparency": 30
        },
        "provenanceScore": 80
      },
      "connect": {
        "http": "curl -X POST https://rest.clicksend.com/v3/sms/send -u \"$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": 80
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/clicksend.json",
      "live": {
        "slug": "clicksend",
        "probe": {
          "target": "https://rest.clicksend.com/v3",
          "method": "get",
          "lastAt": "2026-10-05T00:15:21.420544737Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 336,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 337,
          "p95ms24h": 410,
          "samples24h": 272,
          "samples30d": 1105,
          "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": 3,
              "ok": 3
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.clicksend.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-05T00:11:12.890155366Z"
        },
        "versions": [
          {
            "registry": "mcp-registry",
            "name": "com.clicksend/clicksend-mcp-server",
            "version": "2026.8.23",
            "seenAt": "2026-10-04T23:42:40.113054682Z"
          },
          {
            "registry": "npm",
            "name": "@clicksend/clicksend-mcp-server",
            "version": "2026.8.23",
            "seenAt": "2026-10-04T16:23:44.663957258Z"
          },
          {
            "registry": "npm",
            "name": "clicksend",
            "version": "7.0.0",
            "seenAt": "2026-10-04T16:23:45.615223989Z"
          },
          {
            "registry": "pypi",
            "name": "clicksend-client",
            "version": "6.0.2",
            "released": "2026-09-25",
            "seenAt": "2026-10-04T16:23:46.885265129Z"
          }
        ],
        "githubStars": 3,
        "npmWeekly": 75,
        "pypiWeekly": 10863,
        "securityTxt": {
          "url": "https://clicksend.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:47.282928673Z"
        },
        "llmsTxt": {
          "url": "https://developers.clicksend.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:25.136162781Z"
        },
        "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": "2026-10-04T15:49:52.451782968Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "aa4189367a6c"
          },
          {
            "url": "https://www.clicksend.com/us/legal/privacy-policy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:49:45.897126404Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "84bfd5d9bbc2"
          },
          {
            "url": "https://www.clicksend.com/us/legal/terms-of-service/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:49:50.191890759Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "47fbe76fa40e"
          }
        ],
        "updatedAt": "2026-10-05T00:15:21.420544737Z"
      }
    },
    "b": {
      "slug": "twilio",
      "name": "Twilio API + MCP",
      "vendor": "Twilio",
      "vendorUrl": "https://www.twilio.com",
      "kind": "http-api",
      "category": "messaging",
      "summary": "Programmable Messaging (SMS, MMS, WhatsApp, RCS) and Verify over REST.",
      "url": "https://www.anchorterminal.com/tools/twilio",
      "markdownUrl": "https://www.anchorterminal.com/tools/twilio.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/twilio.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/twilio.json",
      "repo": "https://github.com/twilio-labs/mcp",
      "license": "MIT",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.twilio.com/2010-04-01",
      "packages": [
        {
          "registry": "npm",
          "name": "twilio"
        },
        {
          "registry": "pypi",
          "name": "twilio"
        },
        {
          "registry": "npm",
          "name": "@twilio-alpha/mcp"
        }
      ],
      "auth": "mixed",
      "authNotes": "HTTP Basic auth with the Account SID and Auth Token, or an API key SID and secret (recommended). The hosted docs MCP needs no credentials. The local alpha MCP takes `ACCOUNT_SID/API_KEY:API_SECRET` as a command-line argument, so it shows up in process lists.",
      "pricing": "usage",
      "pricingNotes": "Pay as you go, no monthly fee. US SMS $0.0083 a segment outbound or inbound on long code, toll-free or short code, plus carrier fees of $0.0035 (AT\u0026T), $0.0045 (T-Mobile) or $0.005 (Verizon) a message. US MMS $0.022 outbound, $0.0165 inbound on long code. Long code numbers $1.15 a month, toll-free $2.15. UK SMS $0.056. Failed messages $0.001 each. WhatsApp $0.005 a message Twilio fee plus Meta's template fees. Verify $0.05 a successful verification plus channel fees. Trial lasts 30 days with free units (100 SMS), no card (https://www.twilio.com/en-us/sms/pricing/us).",
      "priceSummary": "Pay per use",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402 support in docs, pricing or MCP README (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 2,
      "popularity": {
        "githubStars": 111,
        "npmWeekly": 7213599,
        "pypiWeekly": 4834611,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.twilio.com/docs/messaging",
      "llmsTxt": "https://www.twilio.com/docs/llms.txt",
      "openapi": "https://raw.githubusercontent.com/twilio/twilio-oai/main/spec/json/twilio_api_v2010.json",
      "capabilities": [
        "messaging.sms",
        "messaging.mms",
        "messaging.whatsapp",
        "messaging.rcs",
        "messaging.verify",
        "messaging.inbound"
      ],
      "tags": [
        "hosted",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "webhooks",
        "whatsapp",
        "sms",
        "enterprise"
      ],
      "lastRelease": "2026-09-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 80.4,
        "grade": "A",
        "agentReady": true,
        "rank": 5,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 1,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 80,
          "maintenance": 85,
          "payments": 40,
          "reliability": 90,
          "schema": 92,
          "security": 85,
          "transparency": 81
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login. US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate.",
        "strengths": [
          "Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login",
          "Restricted API keys with up to 100 endpoint permissions each",
          "Twilio APIs SLA at 99.95 per cent for every paying customer, with 10 per cent credits",
          "Public OpenAPI specs, llms.txt with Markdown twins and a numbered error dictionary",
          "twilio-node released three times in the last 90 days, most recently 6.1.2 on 2026-09-28"
        ],
        "weaknesses": [
          "US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate",
          "A US long code sends 1 message a second per Twilio's scaling guide, with the excess queued for up to 10 hours",
          "No idempotency key on message creation",
          "The MCP that can send is an alpha last published on 2025-07-07, and it takes the API secret as a command-line argument",
          "No security.txt on twilio.com"
        ],
        "agentNotes": [
          "Use the hosted docs MCP to find the endpoint, then call the REST API with a restricted API key",
          "Set `ValidityPeriod` on time-sensitive sends, or a queued message can go out up to 10 hours late",
          "Check the Messages list for the original before retrying a send that timed out, there's no idempotency key",
          "Send only to verified numbers on a trial account, other recipients fail",
          "Validate `X-Twilio-Signature` on every inbound webhook"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 8,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "A",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 80.4
          }
        ],
        "editorialScores": {
          "ergonomics": 80,
          "maintenance": 85,
          "payments": 40,
          "reliability": 90,
          "schema": 92,
          "security": 85,
          "transparency": 72
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl -X POST \"https://api.twilio.com/2010-04-01/Accounts/$TWILIO_ACCOUNT_SID/Messages.json\" \\\n  -u \"$TWILIO_API_KEY:$TWILIO_API_SECRET\" \\\n  --data-urlencode \"To=+15558675310\" --data-urlencode \"From=+15017122661\" \\\n  --data-urlencode \"Body=Hello from Twilio\"",
        "claudeCode": "claude mcp add --transport http twilio-docs https://mcp.twilio.com/docs",
        "config": {
          "mcpServers": {
            "twilio": {
              "args": [
                "-y",
                "@twilio-alpha/mcp",
                "${TWILIO_ACCOUNT_SID}/${TWILIO_API_KEY}:${TWILIO_API_SECRET}",
                "--services",
                "twilio_api_v2010"
              ],
              "command": "npx"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/messaging.sms",
        "tool": "https://letme.dev/twilio"
      },
      "sameCompany": [
        "twilio-voice",
        "stytch-connected-apps",
        "sendgrid"
      ],
      "area": "communication",
      "unitPrices": [
        {
          "item": "SMS outbound, US",
          "unit": "message",
          "usd": 0.0083,
          "note": "per segment, plus carrier fees of $0.0035 to $0.005"
        },
        {
          "item": "SMS outbound, UK",
          "unit": "message",
          "usd": 0.056
        },
        {
          "item": "MMS outbound, US",
          "unit": "message",
          "usd": 0.022
        },
        {
          "item": "WhatsApp Twilio fee",
          "unit": "message",
          "usd": 0.005,
          "note": "inbound or outbound, Meta template fees extra"
        },
        {
          "item": "WhatsApp utility or authentication template, US (Meta fee)",
          "unit": "message",
          "usd": 0.0034,
          "note": "passed through by Twilio"
        }
      ],
      "provenance": {
        "legalEntity": "Twilio Inc.",
        "domain": "twilio.com",
        "domainRegistered": "2007-10-26",
        "endpointOnVendorDomain": true,
        "terms": "https://www.twilio.com/en-us/legal/tos",
        "privacy": "https://www.twilio.com/en-us/legal/privacy",
        "statusPage": "https://status.twilio.com",
        "changelog": "https://www.twilio.com/en-us/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The terms also name Twilio Ireland Limited for customers outside the US."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/twilio.json",
      "live": {
        "slug": "twilio",
        "probe": {
          "target": "https://api.twilio.com/2010-04-01",
          "method": "get",
          "lastAt": "2026-10-05T00:15:31.635835274Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 18,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 6,
          "p95ms24h": 38,
          "samples24h": 272,
          "samples30d": 1105,
          "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": 3,
              "ok": 3
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.twilio.com",
          "indicator": "minor",
          "summary": "Partially Degraded Service",
          "checkedAt": "2026-10-05T00:11:36.452644723Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "twilio-labs/mcp",
            "version": "0.0.3",
            "released": "2025-03-25",
            "seenAt": "2026-10-04T16:42:32.789428185Z"
          },
          {
            "registry": "npm",
            "name": "@twilio-alpha/mcp",
            "version": "0.7.0",
            "seenAt": "2026-10-04T16:42:30.744113269Z"
          },
          {
            "registry": "npm",
            "name": "twilio",
            "version": "6.1.2",
            "seenAt": "2026-10-04T16:42:30.579018738Z"
          },
          {
            "registry": "pypi",
            "name": "twilio",
            "version": "9.11.2",
            "released": "2026-09-28",
            "seenAt": "2026-10-04T16:42:30.630910608Z"
          }
        ],
        "githubStars": 112,
        "npmWeekly": 7817134,
        "pypiWeekly": 5153208,
        "securityTxt": {
          "url": "https://twilio.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:43.282608786Z"
        },
        "llmsTxt": {
          "url": "https://www.twilio.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:20.462714763Z"
        },
        "domain": {
          "domain": "twilio.com",
          "registered": "2007-10-26",
          "source": "https://rdap.verisign.com/com/v1/domain/twilio.com",
          "checkedAt": "2026-10-04T13:05:12.523190086Z"
        },
        "pages": [
          {
            "url": "https://www.twilio.com/en-us/sms/pricing/us",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:52:40.063019901Z",
            "changedAt": "2026-10-03T15:40:31.280177197Z",
            "fingerprint": "b98c31a1bf5b"
          }
        ],
        "updatedAt": "2026-10-05T00:15:31.635835274Z"
      }
    },
    "summary": "Twilio API + MCP has a score of 80.4 (A) against ClickSend SMS API + MCP's 47.8 (D). Both do messaging sms. The largest gap is security \u0026 auth, 62 points."
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  "markdown": "Twilio API + MCP has a score of 80.4 (A) against ClickSend SMS API + MCP's 47.8 (D). Both do messaging sms. The largest gap is security \u0026 auth, 62 points.\n\n- ClickSend SMS API + MCP: grade D, 47.8/100, rank #379 of 452. Markdown https://www.anchorterminal.com/tools/clicksend.md · JSON https://www.anchorterminal.com/api/v1/tools/clicksend.json\n- Twilio API + MCP: grade A, 80.4/100, rank #5 of 452. Markdown https://www.anchorterminal.com/tools/twilio.md · JSON https://www.anchorterminal.com/api/v1/tools/twilio.json\n\n## Which one, for what\n\nPick ClickSend SMS API + MCP for nothing in particular (no category where it leads by five points or more).\n\nPick Twilio API + MCP for reliability (+25), schema \u0026 documentation (+40), agent ergonomics (+10), security \u0026 auth (+62), payments \u0026 pricing (+10), maintenance \u0026 community (+23), transparency \u0026 trust (+26).\n\n## Score by category\n\n| Category | Weight | ClickSend SMS API + MCP | Twilio API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 90 | Twilio API + MCP +25 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 52 | 92 | Twilio API + MCP +40 |\n| Agent ergonomics | 13% (16.2 this run) | 70 | 80 | Twilio API + MCP +10 |\n| Security \u0026 auth | 14% (17.5 this run) | 23 | 85 | Twilio API + MCP +62 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | Twilio API + MCP +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 62 | 85 | Twilio API + MCP +23 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 55 | 81 | Twilio API + MCP +26 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **47.8 · D** | **80.4 · A** | |\n\n## Facts side by side\n\n| Fact | ClickSend SMS API + MCP | Twilio API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | ClickSend (Sinch) | Twilio |\n| Hosted endpoint | `https://rest.clicksend.com/v3` | `https://api.twilio.com/2010-04-01` |\n| Transports | HTTP, stdio | HTTP, Streamable HTTP, stdio |\n| Auth | API key | OAuth or key |\n| Pricing | Pay per use | Pay per use |\n| x402 | no | no |\n| Licence | MIT | MIT |\n| Tools exposed | 6 | 2 |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| MCP registry | `com.clicksend/clicksend-mcp-server` | not listed |\n| Last release | 2026-09-25 | 2026-09-28 |\n| Popularity | 3 stars, 3.7k npm/wk, 7.7k PyPI/wk | 111 stars, 7.2M npm/wk, 4.8M PyPI/wk |\n| Agent reviews | 2.5/5 (2) | 3.5/5 (8) |\n\n## Verdicts\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**Twilio API + MCP.** Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login. US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate.\n\n## Before you call either\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### Twilio API + MCP\n\n1. Use the hosted docs MCP to find the endpoint, then call the REST API with a restricted API key\n2. Set `ValidityPeriod` on time-sensitive sends, or a queued message can go out up to 10 hours late\n3. Check the Messages list for the original before retrying a send that timed out, there's no idempotency key\n4. Send only to verified numbers on a trial account, other recipients fail\n5. Validate `X-Twilio-Signature` on every inbound webhook\n\n## Other comparisons with ClickSend SMS API + MCP or Twilio API + MCP\n\n- [Bandwidth Messaging API + MCP vs ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-clicksend.md)\n- [Bandwidth Messaging API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/bandwidth-vs-twilio.md)\n- [Bird API + MCP vs ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/bird-vs-clicksend.md)\n- [Bird API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/bird-vs-twilio.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 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 Vonage Messages API + MCP](https://www.anchorterminal.com/compare/clicksend-vs-vonage.md)\n- [Infobip API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/infobip-vs-twilio.md)\n- [Plivo API vs Twilio API + MCP](https://www.anchorterminal.com/compare/plivo-vs-twilio.md)\n- [Sinch Messaging APIs + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/sinch-vs-twilio.md)\n- [Telnyx API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/telnyx-vs-twilio.md)\n- [Twilio API + MCP vs Vonage Messages API + MCP](https://www.anchorterminal.com/compare/twilio-vs-vonage.md)\n- [360dialog WhatsApp API + MCP vs Twilio API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-twilio.md)\n- [360dialog WhatsApp API + MCP vs ClickSend SMS API + MCP](https://www.anchorterminal.com/compare/360dialog-vs-clicksend.md)\n",
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        "name": "ClickSend SMS API + MCP vs Twilio API + MCP",
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    "description": "Twilio API + MCP has a score of 80.4 (A) against ClickSend SMS API + MCP's 47.8 (D). Both do messaging sms. The largest gap is security \u0026 auth, 62 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "ClickSend SMS API + MCP vs Twilio API + MCP for AI agents",
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