{"uid":"cap_6TCVUQF3nTafaxf2cR-qD","slug":"x402-gateway-changelog-openapi-9ce9fd9e","name":"x402-gateway changelog_openapi","description":"Pay-per-call MCP gateway: 12 tools (markdown, token_price, wallet_portfolio, whale_alerts, cross_chain_balance, changelog_openapi, changelog_git, mermaid, html_to_markdown, qr_generator, og_image_generator, jobs). Per-tool prices on Base via the Coinbase CDP x402 facilitator: markdown=$0.001, token_price=$0.0005, wallet_portfolio=$0.002, whale_alerts=$0.002, cross_chain_balance=$0.002, changelog_openapi=$0.005, changelog_git=$0.005, mermaid=$0.005, html_to_markdown=$0.001, qr_generator=$0.001, og_image_generator=$0.001, jobs=$0.002. MCP flat rate $0.001.","url":"https://x402.freeq.one/tools/changelog_openapi","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"new_spec":{"type":"object","description":"New OpenAPI specification as a JSON object"},"base_spec_url":{"type":"string","description":"URL of the base (old) OpenAPI spec"}}},"responseSchema":{"type":"json","example":{"result":{}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9cIgB3c3Pdzk16tNofQVO","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates a structured changelog from an OpenAPI specification, diffing versions to surface added, changed, or removed endpoints and schemas","exampleAgentPrompt":"Can you generate a changelog between my old and new OpenAPI specs? Here's the old spec URL: https://api.myapp.com/openapi-v1.json and the new one: https://api.myapp.com/openapi-v2.json — I want to see what endpoints were added, removed, or changed, especially any breaking changes.","exampleUseCases":[{"title":"API release notes for v2 launch","prompt":"I'm releasing v2 of my API — can you diff these two OpenAPI specs and give me a changelog listing every new endpoint, every removed endpoint, and any parameter changes? Old spec: https://api.myservice.com/v1/openapi.json, new spec: https://api.myservice.com/v2/openapi.json"},{"title":"Breaking change audit before deploy","prompt":"Before I deploy this update, can you compare my current OpenAPI spec with the new one and flag any breaking changes — removed endpoints, changed required parameters, or altered response schemas? I'll paste both specs."},{"title":"Auto-generate developer-facing changelog","prompt":"I need to write a developer changelog for my latest API version. Can you take my two OpenAPI specs — the previous release and the current one — and produce a structured, human-readable list of what changed, grouped by added, modified, and deprecated endpoints?"}],"resultDescription":"A structured changelog derived from diffing two OpenAPI specifications, listing added, modified, and removed endpoints and schema changes, including breaking change indicators, formatted for developer consumption.","failureModes":["Invalid or unparseable OpenAPI spec returns an error","Missing required spec input causes a 400-level error","Network timeout if spec URLs are slow to fetch","Specs with identical content return an empty or no-change changelog","Malformed JSON/YAML in spec causes parse failure","Payment not included or insufficient funds returns 402"],"whenToPreferThis":"Choose this endpoint when you need to automatically generate a changelog or detect breaking changes between two versions of an OpenAPI specification, especially in CI/CD pipelines or developer tooling workflows. It is ideal when you want a pay-per-call, no-subscription approach to API diffing without standing up your own diffing infrastructure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:43:14.904Z","isFirstParty":false}