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Synapse API — Citrea RPC Endpoint
x402
Synapse API — Citrea RPC Endpoint is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Provides JSON-RPC access to the Citrea blockchain network, enabling agents to query chain state, submit transactions, and interact with Citrea smart contracts.
Price / call$0.01
Success—
StatusUnknown
How this service works
High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.
Output
Returns a standard JSON-RPC response object containing the result of the requested Citrea blockchain method call, such as account balances, block information, transaction receipts, or contract return values. Errors are returned as JSON-RPC error objects with code and message fields.
Example use cases
Check Citrea wallet balance
“Look up the current balance of wallet address 0xDe45... on the Citrea Bitcoin ZK-rollup network for me.”
Fetch latest Citrea block
“Get the latest block number and its details from the Citrea blockchain right now.”
Read Citrea smart contract state
“Call the eth_call method on Citrea to read the current value stored in the smart contract at 0xFa99... using the given ABI-encoded data.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/citrea/rpc?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to interact specifically with the Citrea Bitcoin ZK-rollup network via standard JSON-RPC. It is preferable when your task requires querying Citrea chain state, submitting transactions, or calling smart contracts on Citrea, and you want pay-per-call pricing without a subscription. If you need to interact with Ethereum mainnet or other EVM chains, use a corresponding RPC endpoint for those networks instead.
Side effects
- Invalid RPC method name returns JSON-RPC error -32601 (Method not found)
- Malformed params array returns JSON-RPC error -32602 (Invalid params)
- Payment failure via x402 results in 402 response before execution
- Network or node unavailability returns a 5xx or timeout error
- Unsupported Citrea-specific methods may return method not supported errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| method | string | |
| params | array |
Tags
x402
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