# httpay.xyz Anthropic Claude API Gateway

> httpay.xyz Anthropic Claude API Gateway is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-05).

Proxies requests to the Anthropic Claude API, enabling pay-per-call access without needing an Anthropic API key

## Facts

- Endpoint: POST https://httpay.xyz/api/gateway/anthropic/%7B*path%7D/*?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-05
- Success rate: 0% of calls made through Zero
- Rating: 1.3 / 5 from 1 review
- Activations on Zero: 2
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-xyz-439e90fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qCKHmsCyzuhHaELBxgInM

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 httpay-xyz-439e90fb -d '<json body>'
```

Example prompt: Can you route this Claude API request through the httpay gateway — send a messages request to claude-3-5-sonnet-20241022 asking it to summarize the following paragraph: 'Agentic AI systems are transforming how software is built.'

## When to prefer this

Choose this endpoint when you need to call the Anthropic Claude API on a per-call basis without holding a full Anthropic API key or subscription, and you are willing to pay a small USDC micropayment per request via the x402 protocol. Particularly useful for agents, demos, or low-volume workflows that don't justify a dedicated Anthropic account.

## Known failure modes

- Payment not provided or insufficient — 402 Payment Required
- Invalid Anthropic API path segment — 404 Not Found
- Malformed request body not matching Claude API schema — 400 Bad Request
- Anthropic upstream error or rate limit — 500 or 429 proxied through
- Unsupported Claude model name — error from upstream
- Missing required messages or prompt field — validation error

## How this service works

API Gateway: Anthropic Claude API

## Output

The raw Anthropic Claude API response, including the generated text content, model name, usage token counts, stop reason, and message ID — identical to a direct Anthropic API call.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-439e90fb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)