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Synapse API — StarkNet RPC Proxy
x402
Synapse API — StarkNet RPC Proxy 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 2026-10-16).
Proxies JSON-RPC method calls to the StarkNet blockchain network, enabling read and write interactions with StarkNet nodes.
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 the standard JSON-RPC response object from the StarkNet node, including a result field containing the requested blockchain data (block info, transaction receipt, contract state, etc.) or an error object with code and message if the call fails.
Example use cases
Check StarkNet account balance
“Query the StarkNet network for the ETH balance of account 0x049d36570d4e46f48e99674bd3fcc84644ddd6b96f7c741b1562b82f9e004dc7 using starknet_call.”
Fetch latest StarkNet block
“Get the most recent block from StarkNet using the starknet_getBlockWithTxHashes method with block_tag set to 'latest'.”
Retrieve StarkNet transaction receipt
“Look up the transaction receipt on StarkNet for tx hash 0x06d11fa74255c1f86aace54cbf382ab8c89e2b90fb0801f751834ca52bf2f7a2 using starknet_getTransactionReceipt.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/starknet/rpc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need pay-per-call access to StarkNet RPC without running your own node or managing an Infura/Alchemy subscription. Ideal for agents that make infrequent or unpredictable StarkNet queries and prefer micro-payment billing via x402 USDC rather than monthly API key plans.
Side effects
- Invalid RPC method name returns JSON-RPC error with code -32601 (method not found)
- Malformed params array causes -32602 (invalid params) error
- StarkNet node unavailable or rate-limited returns 503 or timeout
- Payment failure (insufficient USDC) results in 402 response before the RPC call is made
- Requesting a non-existent block or transaction returns a StarkNet-specific error code
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| method | string | |
| params | array |
Tags
x402
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