# Chain RPC Gateway

> JSON-RPC for Ethereum, Base, and Solana, paid per call. Called through Service Router at https://pay-servicerouter.agents.bakingbad.dev/service/chain-rpc, paid per call.

Full-node JSON-RPC for Ethereum, Base, and Solana mainnets. Send one JSON-RPC request per HTTP call.

## Routes

| Route | Price | Pay with |
|---|---|---|
| `POST /eth` (Ethereum JSON-RPC) | $0.0005 | credits (payment key) |
| `POST /base` (Base JSON-RPC) | $0.0005 | credits (payment key) |
| `POST /sol` (Solana JSON-RPC) | $0.0005 | credits (payment key) |

Only `2xx` answers are charged.

## Call it

```sh
curl -X POST https://pay-servicerouter.agents.bakingbad.dev/service/chain-rpc/eth \
  -H "Authorization: Bearer $SERVICEROUTER_PAYMENT_KEY" \
  -H "Content-Type: application/json" -d '{…}'
```

Pay with a Service Router payment key (credits): https://servicerouter.agents.bakingbad.dev/llms.txt shows how to get one. Without an account, the `402` answer lists x402 and MPP options.

## Documents

- [OpenAPI](https://servicerouter.agents.bakingbad.dev/discover/chain-rpc/openapi.json): every operation, with its price in `x-payment-info`.
- [Agent Skill](https://servicerouter.agents.bakingbad.dev/discover/chain-rpc/skill.md)
- [Service page](https://servicerouter.agents.bakingbad.dev/discover/chain-rpc.md)