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Synapse API — Optimism NFT Sales
x402
Synapse API — Optimism NFT Sales 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 2026-10-12).
Fetches NFT sales transaction history on the Optimism blockchain, filterable by block range and contract address.
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 events from the Optimism blockchain, each containing details such as token IDs, sale prices, buyer/seller addresses, and block numbers, filtered by the specified contract address and block range.
Example use cases
NFT floor price trend analysis
“Get me the 100 most recent NFT sales on Optimism for contract 0xabcd...1234 in descending order so I can analyze recent price trends.”
NFT collection sales monitoring
“Fetch all NFT sales between block 112000000 and 113000000 on Optimism for contract 0xdeadbeef...cafe — I want to see what sold during that window.”
On-chain sales audit for a project
“Give me up to 200 NFT sales records in ascending block order on Optimism for contract 0x9999...aaaa starting from block 100000000 so I can audit the full sales history.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/optimism/nft/sales?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need historical or recent NFT sales data specifically on the Optimism L2 network, filtered by contract and block range. Prefer this over generic blockchain explorers when you need structured, paginated, pay-per-call data without managing RPC nodes or subgraphs.
Side effects
- Invalid contract address format returns a validation error
- fromBlock greater than toBlock results in empty or error response
- Requesting too large a block range may time out or return truncated results
- Non-existent contract address returns empty sales array
- Invalid order enum value (not 'asc' or 'desc') returns a 400 error
- Payment failure via x402 results in 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | number | |
| order | string | |
| toBlock | number | |
| fromBlock | number | |
| contractAddress | string |
Tags
x402
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