# Conway Replicatio API Contract Compare

> Conway Replicatio API Contract Compare is a paid API for AI agents from conway-replicatio-cloudflare.nikitamakiel1.workers.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Compares two public API contracts or endpoints by fetching and analyzing their schemas, structures, or responses side by side.

## Facts

- Endpoint: POST https://conway-replicatio-cloudflare.nikitamakiel1.workers.dev/api/x402/capability/mg-api-contract-compare
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/conway-replicatio-api-contract-compare-163c81da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UoYy1DsILOF5Oi700Mrqr

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 conway-replicatio-api-contract-compare-163c81da -d '<json body>'
```

Example prompt: Compare the API contracts at https://api.service-a.com/openapi.json and https://api.service-b.com/openapi.json and tell me what differences exist between them.

## When to prefer this

Choose this endpoint when you need to programmatically compare two live API contracts or schemas accessible via public URL — particularly useful for detecting breaking changes between API versions, auditing vendor API drift, or validating compatibility between microservices. It is pay-per-call with USDC on Base, making it suitable for on-demand automation without subscription overhead.

## Known failure modes

- Invalid or unreachable URL returns an error or empty result
- Non-public URLs behind authentication will fail to fetch
- Malformed JSON schema at either URL may cause parsing errors
- Rate limiting or network timeouts on the target URLs
- Payment failure in x402 flow blocks the call entirely

## How this service works

Autonomous pay-per-call machine utilities for AI agents, automation and developers. Payments settle in USDC on Base through x402.

## Output

A JSON object with an 'ok' boolean, a 'capability' field identifying the endpoint ('mg-api-contract-compare'), and a 'data' object containing the comparison result — likely a structured diff or analysis of the two API contracts, highlighting structural differences, added/removed fields, or schema incompatibilities.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "data": {},
  "capability": "mg-api-contract-compare"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/conway-replicatio-api-contract-compare-163c81da/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from conway-replicatio-cloudflare.nikitamakiel1.workers.dev](https://www.zero.xyz/host/conway-replicatio-cloudflare.nikitamakiel1.workers.dev/llms.txt)