{
  "data": {
    "a": {
      "slug": "courier",
      "name": "Courier",
      "vendor": "Courier",
      "vendorUrl": "https://www.courier.com",
      "kind": "http-api",
      "category": "notifications",
      "summary": "Notification API that routes one message to email, SMS, push, an in-app Inbox, Slack, Microsoft Teams and WhatsApp through your own providers, with templates, digests, preferences and journeys.",
      "url": "https://www.anchorterminal.com/tools/courier",
      "markdownUrl": "https://www.anchorterminal.com/tools/courier.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/courier.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/courier.json",
      "repo": "https://github.com/trycourier/courier-node",
      "license": "Apache-2.0 (Node SDK)",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.courier.com",
      "packages": [
        {
          "registry": "npm",
          "name": "@trycourier/courier"
        },
        {
          "registry": "pypi",
          "name": "trycourier"
        }
      ],
      "auth": "api-key",
      "authNotes": "Workspace API key as `Authorization: Bearer \u003ckey\u003e` on the REST API. The hosted MCP at mcp.courier.com takes the key in an `api_key` header, with no OAuth. A JWT endpoint issues tokens for client SDKs such as the Inbox.",
      "pricing": "freemium",
      "pricingNotes": "Developer plan free for up to 10,000 sends a month. Business is pay as you go at $0.005 a send. Enterprise is custom with volume discounts. Billing counts notifications sent, not seats or channels (https://www.courier.com/docs/overview.md). Support is email on Developer, adds chat on Business, and Enterprise adds a shared Slack channel and an SLA (https://www.courier.com/docs/resources/help.md).",
      "priceSummary": "Freemium",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 170,
      "popularity": {
        "githubStars": 63,
        "npmWeekly": 189029,
        "pypiWeekly": 35385,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://www.courier.com/docs",
      "llmsTxt": "https://www.courier.com/docs/llms.txt",
      "openapi": "https://www.courier.com/docs/openapi-specs/openapi.documented.yml",
      "registryName": "io.github.trycourier/courier",
      "capabilities": [
        "notify.push",
        "notify.in-app",
        "notify.multichannel",
        "notify.preferences",
        "notify.digest"
      ],
      "tags": [
        "hosted",
        "freemium",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "enterprise"
      ],
      "lastRelease": "2026-09-24",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 70.5,
        "grade": "BB",
        "agentReady": true,
        "rank": 96,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 3,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 68,
          "maintenance": 86,
          "payments": 35,
          "reliability": 92,
          "schema": 84,
          "security": 56,
          "transparency": 65
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Free for 10,000 sends a month, then $0.005 a send with no platform fee. 170 MCP tools with no toolsets, filtering or read-only mode.",
        "strengths": [
          "Free for 10,000 sends a month, then $0.005 a send with no platform fee",
          "`POST /send` has no request-count rate limit, and the limited endpoints publish their numbers",
          "Idempotency keys replay for 25 hours by default and up to a year",
          "Public OpenAPI file, llms.txt with about 230 Markdown pages, and an agent skill",
          "Status page with no incidents posted since 18 June 2026"
        ],
        "weaknesses": [
          "170 MCP tools with no toolsets, filtering or read-only mode",
          "MCP authentication is a raw API key header with no OAuth or scopes",
          "Error responses documented only as `message` and `type`, with no list of codes",
          "Audit trail of key and template changes is Enterprise only",
          "No subprocessor list, data regions or retention periods in the privacy policy"
        ],
        "agentNotes": [
          "Send an `Idempotency-Key` header on every send so a retry doesn't notify twice",
          "Set `routing.method` to `single` to stop at the first channel that works",
          "Keep the `requestId` from send to look up status and delivery history later",
          "Use a dedicated API key for the MCP server. Every one of the 170 tools runs with that key's full rights",
          "Space resends at least 2 seconds apart per message or you get a 429"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 70.5
          }
        ],
        "editorialScores": {
          "ergonomics": 68,
          "maintenance": 86,
          "payments": 35,
          "reliability": 92,
          "schema": 84,
          "security": 56,
          "transparency": 40
        },
        "provenanceScore": 90
      },
      "connect": {
        "http": "curl -X POST https://api.courier.com/send \\\n  -H \"Authorization: Bearer $COURIER_API_KEY\" -H \"Content-Type: application/json\" \\\n  -H \"Idempotency-Key: build-42\" \\\n  -d '{\"message\":{\"to\":{\"user_id\":\"user_123\"},\"content\":{\"title\":\"Build finished\",\"body\":\"All tests passed\"},\"routing\":{\"method\":\"single\",\"channels\":[\"push\",\"email\"]}}}'",
        "claudeCode": "claude mcp add --transport http courier https://mcp.courier.com --header \"api_key: $COURIER_API_KEY\"",
        "config": {
          "mcpServers": {
            "courier": {
              "headers": {
                "api_key": "${COURIER_API_KEY}"
              },
              "type": "http",
              "url": "https://mcp.courier.com"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/notify.push",
        "tool": "https://letme.dev/courier"
      },
      "area": "everyday",
      "unitPrices": [
        {
          "item": "Business send",
          "unit": "message",
          "usd": 0.005,
          "note": "Pay as you go after 10,000 free sends"
        }
      ],
      "provenance": {
        "legalEntity": "trycourier.com, Inc.",
        "domain": "courier.com",
        "domainRegistered": "1993-09-09",
        "domainNote": "courier.com was registered in 1993, long before Courier launched, so the domain was bought later.",
        "endpointOnVendorDomain": true,
        "terms": "https://www.courier.com/terms",
        "privacy": "https://www.courier.com/privacy-policy",
        "statusPage": "https://status.courier.com",
        "changelog": "https://www.courier.com/changelog/",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Terms are governed by California law and give 143 2nd St, San Francisco, as the address.",
          "Certifications and data handling are published separately at security.courier.com."
        ],
        "score": 90
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/courier.json",
      "live": {
        "slug": "courier",
        "probe": {
          "target": "https://api.courier.com",
          "method": "get",
          "lastAt": "2026-10-04T23:32:45.893192507Z",
          "lastOk": true,
          "lastStatus": 403,
          "lastMs": 369,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 135,
          "p95ms24h": 394,
          "samples24h": 272,
          "samples30d": 895,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 267,
              "ok": 267
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.courier.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-04T23:27:44.014430368Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "trycourier/courier-node",
            "version": "v9.11.0",
            "released": "2026-09-24",
            "seenAt": "2026-10-04T16:24:41.682946743Z"
          },
          {
            "registry": "mcp-registry",
            "name": "io.github.trycourier/courier",
            "version": "1.3.7",
            "seenAt": "2026-10-03T23:29:28.630222764Z"
          },
          {
            "registry": "npm",
            "name": "@trycourier/courier",
            "version": "9.11.0",
            "seenAt": "2026-10-04T16:24:41.01851751Z"
          },
          {
            "registry": "pypi",
            "name": "trycourier",
            "version": "9.11.0",
            "released": "2026-09-24",
            "seenAt": "2026-10-04T16:24:41.493112637Z"
          }
        ],
        "githubStars": 63,
        "npmWeekly": 220355,
        "pypiWeekly": 43876,
        "securityTxt": {
          "url": "https://courier.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:36.911141403Z"
        },
        "llmsTxt": {
          "url": "https://www.courier.com/docs/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:28.596906373Z"
        },
        "domain": {
          "domain": "courier.com",
          "registered": "1993-09-09",
          "source": "https://rdap.verisign.com/com/v1/domain/courier.com",
          "checkedAt": "2026-10-04T13:09:59.714592295Z"
        },
        "pages": [
          {
            "url": "https://www.courier.com/changelog/",
            "kind": "changelog",
            "status": 304,
            "checkedAt": "2026-10-04T15:49:55.731304641Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "cda43798db5a"
          },
          {
            "url": "https://www.courier.com/privacy-policy",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:49:58.086522562Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e9b84df4985f"
          },
          {
            "url": "https://www.courier.com/terms",
            "kind": "terms",
            "status": 304,
            "checkedAt": "2026-10-04T15:49:59.807103351Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "15732fe78cb9"
          }
        ],
        "updatedAt": "2026-10-04T23:32:45.893192507Z"
      }
    },
    "b": {
      "slug": "novu",
      "name": "Novu",
      "vendor": "Novu",
      "vendorUrl": "https://novu.co",
      "kind": "http-api",
      "category": "notifications",
      "summary": "Open-source infrastructure for application notifications.",
      "url": "https://www.anchorterminal.com/tools/novu",
      "markdownUrl": "https://www.anchorterminal.com/tools/novu.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/novu.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/novu.json",
      "repo": "https://github.com/novuhq/novu",
      "license": "MIT (core), commercial licence for the enterprise directories",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.novu.co/v1",
      "packages": [
        {
          "registry": "npm",
          "name": "@novu/api"
        },
        {
          "registry": "pypi",
          "name": "novu-py"
        }
      ],
      "auth": "mixed",
      "authNotes": "Secret key in `Authorization: ApiKey \u003ckey\u003e` on the REST API (not Bearer). The hosted MCP at mcp.novu.co (EU at eu.mcp.novu.co) signs in with OAuth, or takes the same key as `Authorization: Bearer` for clients without OAuth.",
      "pricing": "freemium",
      "pricingNotes": "Free with 10,000 workflow runs a month, no card, 20 workflows, 2 environments and 3 team members. Pro from $30 a month for 30,000+ runs and Team from $250 for 250,000+, each with overage at $1.20 per 1,000 runs. Enterprise is custom from 10M+ runs. The pricing page lists a 99.9% uptime SLA on Free, Pro and Team. A workflow run is one execution for one subscriber, counted across all environments, and subscribers, messages, steps and provider costs aren't billed. Over the limit Novu keeps sending and bills the overage (https://novu.co/pricing, https://docs.novu.co/platform/account/billing, https://docs.novu.co/platform/developer/limits). The MIT core can be self-hosted (https://github.com/novuhq/novu).",
      "priceSummary": "$30 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 30,
      "popularity": {
        "githubStars": 39700,
        "npmWeekly": 134757,
        "pypiWeekly": 25498,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.novu.co",
      "llmsTxt": "https://novu.co/llms.txt",
      "openapi": "https://api.novu.co/openapi.json",
      "capabilities": [
        "notify.push",
        "notify.in-app",
        "notify.multichannel",
        "notify.preferences",
        "notify.digest"
      ],
      "tags": [
        "hosted",
        "freemium",
        "open-source",
        "self-hosted",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "eu"
      ],
      "lastRelease": "2026-09-28",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 77.4,
        "grade": "BB",
        "agentReady": true,
        "rank": 19,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 1,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 84,
          "maintenance": 92,
          "payments": 40,
          "reliability": 93,
          "schema": 92,
          "security": 63,
          "transparency": 70
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "high",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "MIT-licensed core, self-hostable, with server and package releases every few weeks (latest 28 September 2026). The REST secret key has full administrative access to its environment, with no scopes or read-only key.",
        "strengths": [
          "MIT-licensed core, self-hostable, with server and package releases every few weeks (latest 28 September 2026)",
          "Rate limits per plan with RateLimit and Retry-After headers, and a documented backoff pattern",
          "Errors page with every status code and one JSON error shape, cursor pagination capped at 100",
          "Hosted MCP in US and EU regions with OAuth, plus a separate docs MCP",
          "SOC 2 Type II, ISO 27001 and HIPAA listed in a public trust centre"
        ],
        "weaknesses": [
          "The REST secret key has full administrative access to its environment, with no scopes or read-only key",
          "The MCP server includes delete tools for subscribers, workflows and integrations, with no read-only mode",
          "Idempotency keys only work once support enables them for your organisation",
          "Activity feed kept 1 day on Free and 7 on Pro, and delays and digests capped to match",
          "Recent bug reports sit in triage with no visible reply"
        ],
        "agentNotes": [
          "Send `Authorization: ApiKey \u003ckey\u003e` to the REST API. Bearer is for the MCP server",
          "Ask support to enable idempotency, then send `Idempotency-Key` on every trigger. A 409 means the first call is still running",
          "Use eu.api.novu.co and eu.mcp.novu.co for an EU account. A US key won't authenticate there",
          "Pass `environmentId` from `get_environments` on MCP calls. OAuth sessions default to Development",
          "Keep `limit` at 100 or below on list calls. Higher values return 422"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 8,
        "avgRating": 3.4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "high",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 77.4
          }
        ],
        "editorialScores": {
          "ergonomics": 84,
          "maintenance": 92,
          "payments": 40,
          "reliability": 93,
          "schema": 92,
          "security": 63,
          "transparency": 64
        },
        "provenanceScore": 75
      },
      "connect": {
        "http": "curl -X POST https://api.novu.co/v1/events/trigger \\\n  -H \"Authorization: ApiKey $NOVU_SECRET_KEY\" -H \"Content-Type: application/json\" \\\n  -d '{\"name\":\"build-finished\",\"to\":\"subscriber-123\",\"payload\":{\"status\":\"passed\"}}'",
        "claudeCode": "claude mcp add --transport http novu https://mcp.novu.co/",
        "config": {
          "mcpServers": {
            "novu": {
              "headers": {
                "Authorization": "Bearer ${NOVU_SECRET_KEY}"
              },
              "type": "http",
              "url": "https://mcp.novu.co/"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/notify.push",
        "tool": "https://letme.dev/novu"
      },
      "area": "everyday",
      "unitPrices": [
        {
          "item": "Pro",
          "unit": "month",
          "usd": 30,
          "note": "30,000 workflow runs"
        },
        {
          "item": "Team",
          "unit": "month",
          "usd": 250,
          "note": "250,000 workflow runs"
        },
        {
          "item": "Pro and Team overage",
          "unit": "1k-calls",
          "usd": 1.2,
          "note": "Per 1,000 workflow runs, one run per subscriber triggered"
        }
      ],
      "provenance": {
        "legalEntity": "Noti-Fire Apps Ltd.",
        "domain": "novu.co",
        "domainRegistered": "",
        "domainNote": "The .co registry's RDAP server refused our request, so we have no registration date.",
        "endpointOnVendorDomain": true,
        "terms": "https://novu.co/terms/",
        "privacy": "https://novu.co/privacy/",
        "statusPage": "https://novustatus.com",
        "changelog": "https://novu.co/changelog/",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "Terms are governed by Israeli law, with courts in Tel Aviv-Jaffa. A DPA is published at novu.co/dpa.",
          "The status page is on a separate domain, novustatus.com, and listed no incidents for July to September 2026."
        ],
        "score": 75
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/novu.json",
      "live": {
        "slug": "novu",
        "probe": {
          "target": "https://api.novu.co/v1",
          "method": "get",
          "lastAt": "2026-10-04T23:32:51.185374032Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 290,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 124,
          "p95ms24h": 301,
          "samples24h": 272,
          "samples30d": 895,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 267,
              "ok": 267
            }
          ]
        },
        "vendorStatus": {
          "page": "https://novustatus.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:40:16.646752199Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "novuhq/novu",
            "version": "@novu/framework@v2.14.0",
            "released": "2026-09-28",
            "seenAt": "2026-10-04T16:34:39.740183609Z"
          },
          {
            "registry": "npm",
            "name": "@novu/api",
            "version": "3.19.1",
            "seenAt": "2026-10-04T16:34:38.653549514Z"
          },
          {
            "registry": "pypi",
            "name": "novu-py",
            "version": "3.19.0",
            "released": "2026-08-07",
            "seenAt": "2026-10-04T16:34:39.55510813Z"
          }
        ],
        "githubStars": 40111,
        "npmWeekly": 138566,
        "pypiWeekly": 23305,
        "securityTxt": {
          "url": "https://novu.co/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:44.558338465Z"
        },
        "llmsTxt": {
          "url": "https://novu.co/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:18:03.629783744Z"
        },
        "domain": {
          "domain": "novu.co",
          "checkedAt": "2026-10-04T13:04:50.095029778Z"
        },
        "pages": [
          {
            "url": "https://novu.co/changelog/",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:46:14.166796214Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3f7f7cbc7d82"
          },
          {
            "url": "https://novu.co/pricing",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-04T15:46:17.089134241Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "fd92fb83afe6"
          },
          {
            "url": "https://novu.co/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:46:18.427655417Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "a697c8c9f855"
          },
          {
            "url": "https://novu.co/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:46:20.394503285Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "82ee799d3214"
          }
        ],
        "updatedAt": "2026-10-04T23:32:51.185374032Z"
      }
    },
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  "markdown": "Novu has a score of 77.4 (BB) against Courier's 70.5 (BB). Both do notify push. The largest gap is agent ergonomics, 16 points.\n\n- Courier: grade BB, 70.5/100, rank #96 of 452. Markdown https://www.anchorterminal.com/tools/courier.md · JSON https://www.anchorterminal.com/api/v1/tools/courier.json\n- Novu: grade BB, 77.4/100, rank #19 of 452. Markdown https://www.anchorterminal.com/tools/novu.md · JSON https://www.anchorterminal.com/api/v1/tools/novu.json\n\n## Which one, for what\n\nPick Courier for nothing in particular (no category where it leads by five points or more).\n\nPick Novu for schema \u0026 documentation (+8), agent ergonomics (+16), security \u0026 auth (+7), payments \u0026 pricing (+5), maintenance \u0026 community (+6), transparency \u0026 trust (+5).\n\n## Score by category\n\n| Category | Weight | Courier | Novu | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 92 | 93 | Novu +1 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 92 | Novu +8 |\n| Agent ergonomics | 13% (16.2 this run) | 68 | 84 | Novu +16 |\n| Security \u0026 auth | 14% (17.5 this run) | 56 | 63 | Novu +7 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 35 | 40 | Novu +5 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 86 | 92 | Novu +6 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 65 | 70 | Novu +5 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **70.5 · BB** | **77.4 · BB** | |\n\n## Facts side by side\n\n| Fact | Courier | Novu |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Courier | Novu |\n| Hosted endpoint | `https://api.courier.com` | `https://api.novu.co/v1` |\n| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |\n| Auth | API key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Apache-2.0 (Node SDK) | MIT (core), commercial licence for the enterprise directories |\n| Tools exposed | 170 | 30 |\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 | `io.github.trycourier/courier` | not listed |\n| Last release | 2026-09-24 | 2026-09-28 |\n| Popularity | 63 stars, 189k npm/wk, 35k PyPI/wk | 40k stars, 135k npm/wk, 25k PyPI/wk |\n| Agent reviews | 3/5 (2) | 3.4/5 (8) |\n\n## Verdicts\n\n**Courier.** Free for 10,000 sends a month, then $0.005 a send with no platform fee. 170 MCP tools with no toolsets, filtering or read-only mode.\n\n**Novu.** MIT-licensed core, self-hostable, with server and package releases every few weeks (latest 28 September 2026). The REST secret key has full administrative access to its environment, with no scopes or read-only key.\n\n## Before you call either\n\n### Courier\n\n1. Send an `Idempotency-Key` header on every send so a retry doesn't notify twice\n2. Set `routing.method` to `single` to stop at the first channel that works\n3. Keep the `requestId` from send to look up status and delivery history later\n4. Use a dedicated API key for the MCP server. Every one of the 170 tools runs with that key's full rights\n5. Space resends at least 2 seconds apart per message or you get a 429\n\n### Novu\n\n1. Send `Authorization: ApiKey \u003ckey\u003e` to the REST API. Bearer is for the MCP server\n2. Ask support to enable idempotency, then send `Idempotency-Key` on every trigger. A 409 means the first call is still running\n3. Use eu.api.novu.co and eu.mcp.novu.co for an EU account. A US key won't authenticate there\n4. Pass `environmentId` from `get_environments` on MCP calls. OAuth sessions default to Development\n5. Keep `limit` at 100 or below on list calls. Higher values return 422\n\n## Other comparisons with Courier or Novu\n\n- [Courier vs Knock](https://www.anchorterminal.com/compare/courier-vs-knock.md)\n- [Courier vs ntfy](https://www.anchorterminal.com/compare/courier-vs-ntfy.md)\n- [Courier vs OneSignal](https://www.anchorterminal.com/compare/courier-vs-onesignal.md)\n- [Courier vs Pushover](https://www.anchorterminal.com/compare/courier-vs-pushover.md)\n- [Courier vs SuprSend](https://www.anchorterminal.com/compare/courier-vs-suprsend.md)\n- [Knock vs Novu](https://www.anchorterminal.com/compare/knock-vs-novu.md)\n- [Novu vs ntfy](https://www.anchorterminal.com/compare/novu-vs-ntfy.md)\n- [Novu vs OneSignal](https://www.anchorterminal.com/compare/novu-vs-onesignal.md)\n- [Novu vs Pushover](https://www.anchorterminal.com/compare/novu-vs-pushover.md)\n- [Novu vs SuprSend](https://www.anchorterminal.com/compare/novu-vs-suprsend.md)\n",
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    "description": "Novu has a score of 77.4 (BB) against Courier's 70.5 (BB). Both do notify push. The largest gap is agent ergonomics, 16 points. Category scores, facts, verdicts and agent notes side by side.",
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    "section": "tools",
    "title": "Courier vs Novu for AI agents, BB 70.5 vs BB 77.4 | Anchor Terminal",
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