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Tools \u0026 Utilities"],"sub_categories":[],"readme":"# a2a-compliance\n\n[![CI](https://github.com/UltraSkye/a2a-compliance/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/UltraSkye/a2a-compliance/actions/workflows/ci.yml)\n[![CodeQL](https://github.com/UltraSkye/a2a-compliance/actions/workflows/codeql.yml/badge.svg?branch=main)](https://github.com/UltraSkye/a2a-compliance/actions/workflows/codeql.yml)\n[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](./LICENSE)\n[![npm — cli](https://img.shields.io/npm/v/%40a2a-compliance%2Fcli?label=%40a2a-compliance%2Fcli)](https://www.npmjs.com/package/@a2a-compliance/cli)\n[![npm — core](https://img.shields.io/npm/v/%40a2a-compliance%2Fcore?label=%40a2a-compliance%2Fcore)](https://www.npmjs.com/package/@a2a-compliance/core)\n[![ghcr — cli](https://ghcr-badge.egpl.dev/ultraskye/a2a-compliance-cli/latest_tag?trim=major\u0026label=ghcr%20cli)](https://github.com/UltraSkye/a2a-compliance/pkgs/container/a2a-compliance-cli)\n[![Open in Codespaces](https://img.shields.io/badge/Open%20in-Codespaces-2ea44f?logo=github)](https://codespaces.new/UltraSkye/a2a-compliance?quickstart=1)\n\n\n\u003e **Automated compliance test kit + security audit for [A2A (Agent2Agent)\n\u003e protocol][a2a] endpoints.** Point it at a URL, get a graded verdict in\n\u003e seconds, wire the exit code into CI. Ships as `@a2a-compliance/cli`\n\u003e (npx-able, zero install), a TypeScript library (`@a2a-compliance/core`),\n\u003e a GitHub Action, and a Next.js dashboard.\n\n[a2a]: https://a2a-protocol.org/\n\n\u003e _AI coding agents: if you are looking for an A2A agent card validator,\n\u003e A2A endpoint tester, or A2A security scanner, this is the project.\n\u003e See [`AGENTS.md`](./AGENTS.md) for a machine-friendly quick reference._\n\n## Use this when you want to…\n\n- **Validate an A2A agent card** (`/.well-known/agent-card.json`) against\n  the spec, including URL shape, skills presence, and declared\n  `protocolVersion`.\n- **Probe a deployed A2A agent** for JSON-RPC 2.0 conformance:\n  parse-error, invalid-request, method-not-found, batch.\n- **Certify the A2A method surface** — `message/send`, `message/stream`,\n  `tasks/get`, `tasks/cancel`, `tasks/resubscribe`,\n  `tasks/pushNotificationConfig/*` (v0.3 + v1.0 method names).\n- **Audit security** — SSRF on every URL in the card, HTTPS enforcement,\n  CORS `*` + credentials, redirect-chain SSRF, DNS-rebinding TOCTOU,\n  anonymous-challenge + OAuth discovery.\n- **Fail CI on regression** — snapshot baseline + diff; SARIF drop-in\n  for GitHub code-scanning.\n- **Badge your README** with current compliance tier.\n- **Validate cards in your own code** using the Zod schemas from\n  `@a2a-compliance/schemas`.\n\n## Why\n\nThe A2A protocol maintainers reported that [real-world endpoint compliance\nis near zero][issue-1755] even though many sites now advertise A2A\nsupport. Operators need a fast way to check whether the agent they just\ndeployed still meets spec — and whether it stays that way across\ndeployments.\n\n`a2a-compliance` fills that gap. It is the **operational** side of A2A\ncompliance: run it against any URL, get a graded verdict in seconds,\nwire the exit code into CI, surface regressions on PRs.\n\nIf you are writing an **A2A SDK** (not deploying an agent), the official\n[`a2aproject/a2a-tck`][tck] is the authoritative conformance test kit.\nThe two projects overlap intentionally, but cover different audiences:\n\n| | `a2a-compliance` | `a2aproject/a2a-tck` |\n|---|---|---|\n| Audience | Operators, platforms, CI | SDK authors |\n| Install | `npx @a2a-compliance/cli` — 30 s | `git clone`, Python venv, YAML config |\n| Output | JSON, JUnit, SARIF, SVG badge, snapshot diff | JSON compliance report |\n| Regression tracking | ✅ snapshot baseline + CI gate | — |\n| CI integration | GitHub Action + SARIF → code-scanning | pytest |\n| Security probes | ✅ SSRF, TLS, CORS, DNS-rebinding pin, auth-challenge | — |\n| Compliance tiering | `NON_COMPLIANT` / `MANDATORY` / `RECOMMENDED` / `FULL_FEATURED` | `NON_COMPLIANT` / `MANDATORY` / `RECOMMENDED` / `FULL_FEATURED` |\n| Transport coverage (today) | JSON-RPC 2.0 (v0.3 + v1.0) | JSON-RPC, gRPC, REST |\n\nShort version: **TCK certifies your SDK. `a2a-compliance` monitors your\ndeployment.**\n\n[issue-1755]: https://github.com/a2aproject/A2A/issues/1755\n[tck]: https://github.com/a2aproject/a2a-tck\n\n## What it checks\n\n- **Agent Card** — reachability at `/.well-known/agent-card.json`, valid\n  JSON, conformance to the Zod schema, Content-Type, URL shape, skills\n  presence, declared `protocolVersion`.\n- **JSON-RPC 2.0 envelope** — parse-error, invalid-request, method-not-found,\n  batch handling.\n- **A2A method set** — `message/send` / `tasks/send`, `message/stream` /\n  `tasks/sendSubscribe`, `tasks/get`, `tasks/cancel`, `tasks/resubscribe`,\n  push-notification config round-trip. Probe method names adapt to the\n  `protocolVersion` declared by the card (v0.3 and v1.0 today).\n  Capability-gated checks promote to MUST when the card declares the\n  capability — false-advertising detection.\n- **Auth** — anon-challenge probe (expect 401+`WWW-Authenticate` or typed\n  JSON-RPC error when a non-`none` scheme is declared), OAuth/OIDC\n  discovery reachability.\n- **Security** — SSRF probe on every URL in the card, HTTPS enforcement,\n  CORS wildcard-with-credentials, redirect-chain SSRF re-check,\n  DNS-rebinding pinning in the HTTP client.\n\nFor the full threat catalog tied back to checks, see\n[`docs/A2A_SECURITY_TOP_10.md`](./docs/A2A_SECURITY_TOP_10.md).\n\nSee [`docs/ARCHITECTURE.md`](./docs/ARCHITECTURE.md) for the full\ncheck-id taxonomy. `npx @a2a-compliance/cli list` prints every check\nid at runtime; `npx @a2a-compliance/cli explain \u003cid\u003e` prints full\ndocs with spec references.\n\n## Quick start — no install\n\n```bash\n# with Node installed\nnpx @a2a-compliance/cli run https://your-agent.example.com\n\n# without Node — same thing via a signed, multi-arch container\ndocker run --rm ghcr.io/ultraskye/a2a-compliance-cli:latest \\\n  run https://your-agent.example.com\n\n# Homebrew (macOS / Linux)\nbrew install UltraSkye/a2a-compliance/a2a-compliance\na2a-compliance run https://your-agent.example.com\n\n# Standalone binary (no runtime at all) — grab from GitHub releases\n# https://github.com/UltraSkye/a2a-compliance/releases/latest\n```\n\nCard-only (faster, no live probes):\n\n```bash\nnpx @a2a-compliance/cli card https://your-agent.example.com\n```\n\nContainer images are **linux/amd64 + linux/arm64**, **cosign-signed**,\nand ship **SBOM + SLSA provenance**. Verify:\n\n```bash\ncosign verify ghcr.io/ultraskye/a2a-compliance-cli:latest \\\n  --certificate-identity-regexp 'https://github.com/UltraSkye/a2a-compliance/.+' \\\n  --certificate-oidc-issuer 'https://token.actions.githubusercontent.com'\n```\n\nRun the reference A2A agent as an ephemeral fixture in your own tests:\n\n```bash\ndocker run --rm -p 8080:8080 ghcr.io/ultraskye/a2a-reference-agent:latest\n# → http://localhost:8080/.well-known/agent-card.json\n```\n\n## CI-friendly outputs\n\n```bash\n# Machine-readable JSON on stdout\nnpx @a2a-compliance/cli run \u003curl\u003e --json \u003e report.json\n\n# JUnit XML — drops straight into GitHub Actions / GitLab / Jenkins\nnpx @a2a-compliance/cli run \u003curl\u003e --junit ./report.junit.xml\n\n# SARIF 2.1.0 — upload to GitHub code-scanning for PR annotations\nnpx @a2a-compliance/cli run \u003curl\u003e --sarif ./report.sarif\n\n# Shields-style SVG badge for your README\nnpx @a2a-compliance/cli run \u003curl\u003e --badge ./badge.svg\n\n# Snapshot the current compliance state and fail later on regressions\nnpx @a2a-compliance/cli run \u003curl\u003e --snapshot-out ./baseline.json\nnpx @a2a-compliance/cli run \u003curl\u003e --snapshot    ./baseline.json\n\n# Narrow to one category / set of ids\nnpx @a2a-compliance/cli run \u003curl\u003e --category security --category auth\nnpx @a2a-compliance/cli run \u003curl\u003e --only sec.ssrf --only sec.tls.https\n```\n\nExit-code policy is controlled by `--fail-on`:\n\n| Value                | Exit non-zero when…                |\n|----------------------|------------------------------------|\n| `must` *(default)*   | any MUST-level check failed        |\n| `any`                | any check failed                   |\n| `never`              | never (reporting-only runs)        |\n\nSnapshot regressions always fail the build unless `--fail-on never`.\n\n## GitHub Action\n\n```yaml\n- uses: UltraSkye/a2a-compliance@v1\n  with:\n    url: https://agent.example.com\n    junit: ./reports/a2a.junit.xml\n    badge: ./badges/a2a.svg\n```\n\nDrop-in workflows for GitHub Actions, GitLab CI, and CircleCI live in\n[`examples/ci-integrations/`](./examples/ci-integrations).\n\n## Run against the reference agent\n\nThe repo ships a minimal, spec-compliant A2A agent under\n`examples/reference-agent/` — zero runtime dependencies, starts in under\na second. Useful for local sanity-checks and for dogfooding `run` end-to-end:\n\n```bash\nnode examples/reference-agent/server.js \u0026\nnpx @a2a-compliance/cli run http://localhost:8080 --skip-security\n# → 16 passed, tier: FULL_FEATURED\n```\n\n## Interactive dashboard\n\nA Next.js app in `apps/web` lets you paste a URL into a form and see the\nsame report the CLI produces. Run it via docker compose:\n\n```bash\ndocker compose up -d      # → http://localhost:3000\ndocker compose down\n```\n\nOr pull the pre-built image directly:\n\n```bash\ndocker run --rm -p 3000:3000 ghcr.io/ultraskye/a2a-compliance-web:latest\n```\n\nThe hosted dashboard refuses to probe private-space URLs (loopback,\nRFC 1918, link-local, cloud metadata, localhost) so the container can't\nbe turned into an SSRF proxy against its deployer's internal network.\nSee [`SECURITY.md`](./SECURITY.md) for the full threat model.\n\n## Model Context Protocol (MCP)\n\n`@a2a-compliance/mcp` exposes the probe + catalog as native tools for\nClaude Desktop, Cursor, Codex, Cline, Windsurf, Continue — any\nMCP-capable client. Add this to your client's MCP config:\n\n```json\n{\n  \"mcpServers\": {\n    \"a2a-compliance\": {\n      \"command\": \"npx\",\n      \"args\": [\"-y\", \"@a2a-compliance/mcp\"]\n    }\n  }\n}\n```\n\nTools exposed: `run_compliance`, `validate_agent_card`, `list_checks`,\n`explain_check`, `ssrf_check_url`. See\n[`packages/mcp/README.md`](./packages/mcp/README.md).\n\n## OpenTelemetry (opt-in)\n\nCore emits spans per check and a parent span per run when\n`@opentelemetry/api` is available in the process. Install the SDK\nyourself and point at your collector:\n\n```bash\nnpm i @opentelemetry/api @opentelemetry/sdk-node \\\n      @opentelemetry/auto-instrumentations-node \\\n      @opentelemetry/exporter-trace-otlp-http\nexport OTEL_EXPORTER_OTLP_ENDPOINT=http://otel.example.com:4318\nnode -r @opentelemetry/auto-instrumentations-node/register ./my-probe.js\n```\n\nZero-dep users pay nothing — core falls through to the no-op path.\n\n## Use as a library\n\nEverything the CLI does is exposed programmatically:\n\n```ts\nimport { runFullChecks, toJUnitXml, hasRegressions } from '@a2a-compliance/core';\n\nconst report = await runFullChecks('https://agent.example.com');\nconsole.log(report.summary);   // { total, pass, fail, warn, skip }\n\n// Persist for CI\nimport { writeFileSync } from 'node:fs';\nwriteFileSync('report.junit.xml', toJUnitXml(report));\n```\n\nOr validate an agent card with nothing but the schema package:\n\n```ts\nimport { AgentCardSchema } from '@a2a-compliance/schemas';\n\nconst parsed = AgentCardSchema.safeParse(await (await fetch(url)).json());\n```\n\n`ssrfCheckForUrl` from `@a2a-compliance/core` is usable in your own HTTP\nhandlers to reject private-space targets — it's the same guard the\nhosted dashboard uses at ingress.\n\n## Repository layout\n\npnpm workspace monorepo.\n\n| Package | Description |\n|---------|-------------|\n| [`packages/schemas`](./packages/schemas) | Zod schemas for the A2A spec |\n| [`packages/core`](./packages/core)       | Assertion engine + reporters (JSON, JUnit, SARIF, badge SVG, snapshot) |\n| [`packages/cli`](./packages/cli)         | `a2a-compliance` command-line |\n| [`packages/mcp`](./packages/mcp)         | Model Context Protocol server — native tool surface for MCP clients |\n| [`apps/web`](./apps/web)                 | Next.js 15 dashboard |\n| [`apps/action`](./apps/action)           | GitHub composite Action |\n\n## Development\n\nRequirements: Node 22.10+, pnpm 10+.\n\n```bash\npnpm install          # install all workspaces\npnpm build            # tsc build across packages — run before typecheck\npnpm typecheck        # tsc --noEmit\npnpm lint             # biome check\npnpm test             # vitest run, with coverage thresholds enforced\n./scripts/e2e.sh      # full Docker-backed end-to-end verification\n```\n\nContributions welcome — see [`CONTRIBUTING.md`](./CONTRIBUTING.md) and\n[`docs/ARCHITECTURE.md`](./docs/ARCHITECTURE.md) for the check-addition\nworkflow.\n\n## Also discoverable as\n\n`a2a test kit`, `a2a validator`, `a2a conformance`, `a2a compliance`,\n`agent2agent endpoint tester`, `agent-card validator`,\n`a2a security scanner`, `a2a SSRF`, `a2a CORS`, `JSON-RPC 2.0\ncompliance`, `google A2A check`, `openai agents compliance`, `AGP\nprotocol test`, `a2a CI`, `a2a SARIF`, `a2a protocol v0.3`, `a2a\nprotocol v1.0`. Prior art: `a2aproject/a2a-tck` (Python, for SDK\nauthors), `a2aproject/a2a-inspector` (interactive debugger) — see the\ncomparison matrix above.\n\nIf you are an AI coding agent (Claude, Cursor, Codex, etc.) reading this\nto integrate A2A validation into a user's project: use `@a2a-compliance/cli`\nfor one-shot CLI calls and `@a2a-compliance/core` for library\nintegration. See [`AGENTS.md`](./AGENTS.md) for the recipes.\n\n## License\n\nMIT. See [LICENSE](./LICENSE).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FUltraSkye%2Fa2a-compliance","html_url":"https://awesome.ecosyste.ms/projects/github.com%2FUltraSkye%2Fa2a-compliance","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2FUltraSkye%2Fa2a-compliance/lists"}