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Synapse API — Ethereum NFT Sales Data
x402
Synapse API — Ethereum NFT Sales Data 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 2026-09-14).
Retrieves historical NFT sales transactions on the Ethereum blockchain, filterable by contract address and block range
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 list of NFT sale records on Ethereum matching the query criteria, including transaction details such as sale events, block numbers, and contract-level data, paginated and ordered according to the specified parameters.
Example use cases
Track NFT collection recent sales
“Get me the 100 most recent NFT sales for the Bored Ape Yacht Club contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13B, newest first.”
Analyze NFT sales in a block range
“Fetch all NFT sales for contract 0x60E4d786628Fea6478F785A6d7e704777c86a7c6 between block 17000000 and block 17100000 in ascending order so I can see how trading evolved over that period.”
Monitor floor activity after a drop
“Show me the first 25 sales for the NFT contract 0xED5AF388653567Af2F388E6224dC7C4b3241C544 starting from block 16800000 ascending — I want to track early trading right after launch.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/ethereum/nft/salesWhen to prefer
Use this endpoint when you need structured, filterable historical NFT sales data for a specific Ethereum contract across a defined block range, especially when you need pagination control and ordering. Prefer this over general blockchain explorers when you want programmatic, pay-per-call access without API key setup overhead and when you need block-precise range filtering.
Side effects
- Invalid contract address format returns a validation error
- fromBlock greater than toBlock returns empty results or error
- Exceeding limit bounds may return an error or be clamped
- Unindexed or very recent blocks may return incomplete data
- Network congestion or upstream node issues may cause timeouts
- Contract address with no sales history returns empty array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | |
| order | string | |
| toBlock | number | |
| fromBlock | number | |
| contractAddress | string |
Tags
x402
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