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Synapse API — Katana RPC Endpoint
x402
Synapse API — Katana 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 2026-09-13).
Exposes a JSON-RPC interface for the Katana blockchain node, enabling interaction with Katana-compatible chain methods via pay-per-call x402 payments
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
A JSON-RPC response object containing the result field with the on-chain data, transaction hash, block details, or error object depending on the method called.
Example use cases
Query current block number
“Call the Katana RPC endpoint with the method 'eth_blockNumber' and empty params, and tell me what the latest block number is on the Katana chain.”
Read smart contract storage slot
“Use Katana RPC to call 'eth_getStorageAt' with contract address 0xABC123, storage slot 0x0, and block tag 'latest' — I need to read that storage value on-chain.”
Broadcast raw transaction to Katana
“Submit this signed raw transaction to the Katana network using 'eth_sendRawTransaction' with params ['0xf86c...'] and confirm it was accepted.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/katana/rpcWhen to prefer
Choose this endpoint when you need pay-per-call, no-subscription access to a Katana-compatible blockchain node via standard JSON-RPC, particularly when you want to avoid running your own node or committing to a monthly RPC plan. Best for low-frequency or one-off on-chain queries and transaction submissions on the Katana network.
Side effects
- Invalid RPC method name returns a JSON-RPC error with code -32601
- Malformed params array causes -32602 invalid params error
- Payment not provided or insufficient USDC results in HTTP 402 Payment Required
- Network congestion or node unavailability causes timeout or -32603 internal error
- Submitting an already-mined or invalid transaction returns execution reverted error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| method | string | |
| params | array |
Tags
x402
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