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Openapi Diff

by OpenAPI / Swagger diff in Documents & files

x402 APIPassing, checked 3 h ago

Compare two OpenAPI 3.x or Swagger 2.x documents and return a structured diff: added / removed / changed endpoints, with a conservative "is any change breaking?" flag. Breaking = an endpoint or required-2xx status was removed, a required parameter was added, an optional param became required, a param type changed, or a JSON body field became required. Pure CPU - deterministic, no network, no $ref dereferencing (resolve refs upstream if needed).

POST https://agent402.tools/api/openapi-diff

Last 30 days

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Uptime
100%
Response time
206 ms typical, 206 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/openapi-diff" \
  -H "content-type: application/json" \
  -d '{"after":{"openapi":"3.0.0","paths":{"/admin":{"post":{"responses":{"201":{}}}},"/users":{"get":{"responses":{"200":{}}}}}},"before":{"openapi":"3.0.0","paths":{"/legacy":{"get":{"responses":{"200":{}}}},"/users":{"get":{"responses":{"200":{}}}}}}}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fopenapi-diff
const res = await pay("https://agent402.tools/api/openapi-diff", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"after":{"openapi":"3.0.0","paths":{"/admin":{"post":{"responses":{"201":{}}}},"/users":{"get":{"responses":{"200":{}}}}}},"before":{"openapi":"3.0.0","paths":{"/legacy":{"get":{"responses":{"200":{}}}},"/users":{"get":{"responses":{"200":{}}}}}}}),
});
console.log(await res.json());

Example input

{
  "after": {
    "openapi": "3.0.0",
    "paths": {
      "/admin": {
        "post": {
          "responses": {
            "201": {}
          }
        }
      },
      "/users": {
        "get": {
          "responses": {
            "200": {}
          }
        }
      }
    }
  },
  "before": {
    "openapi": "3.0.0",
    "paths": {
      "/legacy": {
        "get": {
          "responses": {
            "200": {}
          }
        }
      },
      "/users": {
        "get": {
          "responses": {
            "200": {}
          }
        }
      }
    }
  }
}

Example output

{
  "added": [
    "POST /admin"
  ],
  "breaking": true,
  "breakingCount": 1,
  "changed": [],
  "removed": [
    "GET /legacy"
  ],
  "summary": {
    "added": 1,
    "changed": 0,
    "removed": 1
  }
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402206 ms$0.001