# GENESIS Agent Tools — API Breaking Change Detector (Dexter Facilitator)

> GENESIS Agent Tools — API Breaking Change Detector (Dexter Facilitator) is a paid API for AI agents from genesis-agent-tools.genesisagenttools.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-30).

Analyzes two versions of an API schema to detect breaking changes and compatibility issues, returning evidence and warnings.

## Facts

- Endpoint: POST https://genesis-agent-tools.genesisagenttools.workers.dev/api/flagships/check-api-breaking-change/facilitator/dexter?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/genesis-agent-tools-api-breaking-change-detector-dexter-facilitator-38b0975e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qSbCp6_FcHULShgX_HXr2

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability genesis-agent-tools-api-breaking-change-detector-dexter-facilitator-38b0975e -d '<json body>'
```

Example prompt: Run a quick breaking-change check between my old and new API schemas — here's the previous version and the current version — and tell me if anything will break for existing clients.

## When to prefer this

Choose this endpoint when you need a fast, pay-per-call, agent-native API compatibility check without standing up your own schema-diffing infrastructure. It is particularly useful in autonomous release pipelines or CI/CD agent workflows where you want deterministic breaking-change detection paid per-use in USDC rather than via a subscription. The 'quick' tier is ideal for real-time gates; 'deep' is better for thorough pre-release audits.

## Known failure modes

- Missing or malformed 'current' or 'previous' schema fields returns an error
- Invalid 'tier' enum value (not 'quick' or 'deep') causes rejection
- Payment not fulfilled via x402/Base USDC results in 402 response
- Schemas too large or deeply nested may produce incomplete analysis
- Network timeout on the Cloudflare Worker returns a 5xx error

## How this service works

Pay-per-call x402 APIs for autonomous agents on Base USDC: API compatibility analysis, bounded HTTP/JSON workflows, URL evidence analysis, crypto price consensus, and agent/MCP readiness checks.

## Output

A JSON object with an 'ok' boolean, the analysis tier used, a 'result' object with breaking-change details, a 'product' field set to 'release-guardian', an 'evidence' array of supporting observations, and a 'warnings' array of potential issues.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tier": {
   "enum": [
    "quick",
    "deep"
   ],
   "type": "string"
  },
  "input": {
   "type": "object",
   "properties": {
    "current": {},
    "previous": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "tier": "quick",
  "result": {},
  "product": "release-guardian",
  "evidence": [],
  "warnings": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/genesis-agent-tools-api-breaking-change-detector-dexter-facilitator-38b0975e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from genesis-agent-tools.genesisagenttools.workers.dev](https://www.zero.xyz/host/genesis-agent-tools.genesisagenttools.workers.dev/llms.txt)