# Bankr LLM Gateway – Claude Messages API

> Bankr LLM Gateway – Claude Messages API is a free API for AI agents from llm.bankr.bot, Free, status unknown (last checked 2026-10-10, last successful call 2026-05-28).

Send messages to Claude models via an Anthropic-compatible API endpoint hosted on the Bankr LLM Gateway with x402 payment support.

## Facts

- Endpoint: POST https://llm.bankr.bot/v1/messages?utm_source=zero.xyz
- Price: Free
- Status: unknown
- Last checked: 2026-10-10
- Last successful call: 2026-05-28
- Success rate: 13% of calls made through Zero
- Activations on Zero: 8
- Tags: x402
- Canonical page: https://www.zero.xyz/c/anthropic-67ff6849
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_J2SarZ5h9QcSDIUy6JST1

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 anthropic-67ff6849 -d '<json body>'
```

Example prompt: Using the Bankr LLM Gateway's Anthropic-compatible messages endpoint, send this conversation to claude-3-5-sonnet-20241022 with a system prompt of 'You are a helpful assistant' and ask: 'Explain the x402 payment protocol in two sentences.'

## When to prefer this

Use this endpoint when you need Anthropic Claude inference within a crypto-native or x402-enabled workflow, especially when using agents that pay per call via USDC micropayments. Prefer this over direct Anthropic API when working within the Bankr ecosystem, needing on-chain payment attestation, or building agentic pipelines that must interoperate with x402-compatible infrastructure.

## Known failure modes

- Invalid or unsupported model name returns 400 or 404
- Malformed messages array structure returns 422
- Payment failure or insufficient USDC balance may return 402
- Gateway or upstream Anthropic outage returns 503
- Rate limiting by the gateway returns 429
- Missing required fields (model, messages) returns 400

## How this service works

Anthropic-compatible messages API for the Bankr LLM Gateway.

## Output

Returns an Anthropic-format response object containing the assistant's reply message, the model used, stop reason (e.g. end_turn), and token usage statistics (input tokens, output tokens).

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/anthropic-67ff6849/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llm.bankr.bot](https://www.zero.xyz/host/llm.bankr.bot/llms.txt)