# Phantom API — Citrea RPC Endpoint

> Phantom API — Citrea RPC Endpoint is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Provides JSON-RPC access to the Citrea blockchain network, enabling queries and interactions with on-chain data via a pay-per-call model.

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/citrea/rpc
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-citrea-rpc-endpoint-28c51186
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1mFvj-mlWq-Cbg5hU6tzw

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 phantom-api-citrea-rpc-endpoint-28c51186 -d '<json body>'
```

Example prompt: Can you check the latest block number on the Citrea network using eth_blockNumber?

## When to prefer this

Choose this endpoint when you need direct JSON-RPC access to the Citrea blockchain specifically, and want pay-per-call pricing without a subscription. Ideal for infrequent or agent-driven on-chain queries where you don't want to run your own node or commit to a monthly RPC plan.

## Known failure modes

- Invalid JSON-RPC method name returns error response
- Malformed params array causes parse error
- Payment not included or insufficient results in 402 Payment Required
- Network congestion or node unavailability causes timeout
- Unsupported Citrea-specific method returns method not found error

## How this service works

Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.

## Output

A standard JSON-RPC response object containing the result field with requested blockchain data (block info, balances, transaction details, contract return values, etc.) or an error object with code and message if the call fails.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string"
  },
  "params": {
   "type": "array",
   "items": {}
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-citrea-rpc-endpoint-28c51186/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phantom-api-omega.vercel.app](https://www.zero.xyz/host/phantom-api-omega.vercel.app/llms.txt)