# OpenFacilitator Demo Unreliable Endpoint

> OpenFacilitator Demo Unreliable Endpoint is a paid API for AI agents from api.openfacilitator.io, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-14).

A demo endpoint that randomly fails 50% of the time, designed for testing retry logic and error-handling in x402 payment-gated API integrations

## Facts

- Endpoint: POST https://api.openfacilitator.io/demo/unreliable
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/openfacilitator-demo-unreliable-endpoint-6e33b2fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IzwMLH4WmvavYt1V35UEu

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 openfacilitator-demo-unreliable-endpoint-6e33b2fd -d '<json body>'
```

Example prompt: Hit the OpenFacilitator demo unreliable endpoint and tell me whether it succeeded or failed this time — I want to test my retry logic against something that randomly fails about half the time.

## When to prefer this

Choose this endpoint specifically when you need a live, payment-gated endpoint that reliably produces random failures for testing retry logic, circuit breakers, or error-handling pipelines in x402-based agent workflows. Not suitable for any production use case.

## Known failure modes

- Intentional 50% random failure — not a bug, by design; retry or handle gracefully
- Payment rejected if x402 USDC header is missing or underfunded
- Network timeout or unreachable host if api.openfacilitator.io is down
- Unexpected 100% failure rate if the endpoint is temporarily broken beyond its intended behavior

## How this service works

Demo endpoint - Base USDC ($0.10)

## Output

Either a success response or a random failure/error, with roughly 50% probability of each outcome on every call. Useful for observing how your client handles intermittent failures in x402-gated API workflows.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/openfacilitator-demo-unreliable-endpoint-6e33b2fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.openfacilitator.io](https://www.zero.xyz/host/api.openfacilitator.io/llms.txt)