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Synapse API — Kaia Blockchain RPC
x402
Synapse API — Kaia Blockchain RPC 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 2026-09-15).
Provides a pay-per-call JSON-RPC gateway to the Kaia (formerly Klaytn) blockchain network, enabling queries and interactions with Kaia chain state.
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 Kaia blockchain method call, such as block data, account balances, transaction receipts, or smart contract return values. Errors are returned as JSON-RPC error objects with code and message fields.
Example use cases
Check Kaia account balance
“What is the KAIA token balance of wallet address 0xABC123... on the Kaia network? Use eth_getBalance to look it up.”
Fetch latest Kaia block
“Get me the details of the latest block on the Kaia blockchain, including transaction count and timestamp, using eth_getBlockByNumber.”
Broadcast signed Kaia transaction
“I have a signed raw transaction for the Kaia network — can you broadcast it using eth_sendRawTransaction so it gets submitted to the chain?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/kaia/rpcWhen to prefer
Choose this endpoint when you specifically need to interact with the Kaia (formerly Klaytn) blockchain network via standard JSON-RPC calls, especially in a pay-per-call context without needing a dedicated node or API key subscription. Prefer this over self-hosted nodes when you want low-overhead, on-demand access to Kaia chain data for agents or automation workflows.
Side effects
- Invalid JSON-RPC method name returns error code -32601 (Method not found)
- Malformed params array causes -32602 (Invalid params) error
- Network congestion may cause timeouts on heavy queries
- Payment failure (402) if x402 micropayment not included or insufficient
- Kaia node unavailability returns 503 or connection error
- Submitting an invalid or malformed raw transaction returns execution revert or bad request error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| method | string | |
| params | array |
Tags
x402
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