{"uid":"cap_N7w1kPamGVXebYwHo8zML","slug":"agentx-sale-a2a-mcp-protocol-card-linter-d72ada20","name":"agentx.sale A2A/MCP Protocol Card Linter","description":"A2A / MCP protocol card lint: validate agent.json / server-card.json and return drop-in patched JSON fixes","url":"https://agentx.sale/x402/protocol-lint?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"fixes":[],"valid":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_cFfdwsp_sq8HGSg6zq8qe","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates an agent.json or server-card.json URL against the A2A/MCP protocol spec and returns drop-in patched JSON fixes","exampleAgentPrompt":"Can you validate my agent.json at https://myagent.example.com/.well-known/agent.json against the A2A spec and give me a drop-in patched version with any fixes applied?","exampleUseCases":[{"title":"Fix broken agent manifest before launch","prompt":"My agent.json at https://myservice.ai/.well-known/agent.json isn't passing A2A validation — can you lint it and give me the corrected JSON I can drop straight in?"},{"title":"MCP server card compliance check","prompt":"Check whether my MCP server card at https://api.example.com/server-card.json is spec-compliant and show me exactly what needs to change."},{"title":"CI pipeline agent protocol validation","prompt":"Before I deploy, can you validate the agent.json hosted at https://staging.mybot.dev/agent.json and return a patched version if there are any protocol errors?"}],"resultDescription":"Returns a linting verdict indicating whether the agent.json or server-card.json at the given URL is valid, a list of specific spec violations or missing fields, and a drop-in patched JSON object with the issues resolved that can be used as a direct replacement.","failureModes":["URL is unreachable or returns non-200 — endpoint cannot fetch the card","URL points to non-JSON content — parse error returned","JSON is not recognizable as an agent.json or server-card.json format — schema mismatch error","Rate limiting or payment failure for the x402 micropayment ($0.02 USDC)","URL missing from query params — required parameter validation error"],"whenToPreferThis":"Use this endpoint when you need automated, spec-aware linting of A2A agent.json or MCP server-card.json files with actionable patched output. It goes beyond a generic JSON schema validator by understanding the A2A/MCP protocol semantics and returning ready-to-use fixed JSON, making it ideal for CI pipelines, pre-deployment checks, or agent-readiness workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:20:33.458Z","isFirstParty":false,"canonicalSlug":"agentx-sale-a2a-mcp-protocol-card-linter-d72ada20"}