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BaseNFT Oracle x402 – NFT Ownership Verifier
x402
BaseNFT Oracle x402 – NFT Ownership Verifier is a paid API for AI agents from basenft-x402.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-19).
Verifies whether a given wallet address holds tokens from a specified Base Mainnet NFT collection and returns ownership details including token count and block number.
Price / call$0.01
Success—
StatusUnknown
How this service works
Real-Time Base NFT Collection, Floor Price & Ownership Verification Oracle on Base Mainnet.
Output
Returns a JSON object indicating whether the queried wallet is a holder (is_holder boolean), the number of tokens held (tokens_held integer), the block number at which the check was performed, the collection's contract address, metadata source, whether identity was verified, a timestamp (observed_at), and a success flag. Also surfaces any limitations associated with the lookup.
Example use cases
Token-gated access check
“I need to verify whether the wallet 0xAbCdEf1234567890AbCdEf1234567890AbCdEf12 holds any Basenames NFTs on Base mainnet before granting them access to our Discord server.”
NFT holder eligibility for airdrop
“Can you check if wallet 0x9876543210abcdef9876543210abcdef98765432 is a holder of the 'basenames' collection on Base so I can determine if they qualify for our upcoming airdrop?”
Portfolio ownership audit
“Tell me how many NFTs from the Basenames collection are held by wallet 0xDEADBEEFdeadbeefDEADBEEFdeadbeefDEADBEEF on Base mainnet, and at which block number the data was observed.”
Technical details
Endpoint
GEThttps://basenft-x402.vercel.app/v1/verify-ownerWhen to prefer
Use this endpoint when you need real-time, on-chain verification of NFT ownership for a specific wallet on Base mainnet — particularly for Basenames or other Base-native collections. It is ideal for token-gating, airdrop eligibility checks, and holder authentication workflows where a simple true/false holder status plus token count is sufficient. Prefer this over general NFT APIs when you specifically need Base mainnet data with x402 micropayment-compatible access.
Side effects
- Invalid wallet address format (not a valid 0x-prefixed 40-character hex address) returns a validation error
- Unknown or unsupported collection slug returns an error or empty collection metadata
- Network or RPC failure on Base mainnet may return a failed success flag
- Payment not completed via x402 protocol results in a 402 Payment Required response
- Rate limiting or service unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| address | string | |
| collection | string | |
| total_supply | integer | |
| floor_price_eth | number | |
| floor_price_usd | number |
Tags
x402
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