x402-toolbox NFT Balance Checker

x402

x402-toolbox NFT Balance Checker is a paid API for AI agents from x402-toolbox.shablony-pro.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-02).

Returns the NFT (non-fungible token) balance for a given blockchain address on a specified chain, paid per-call via x402/USDC with no API key required.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

309 deterministic pay-per-call tools for AI agents over x402 (USDC, Base). No signup, no API key: the payment is the identity.

Output

A JSON object with an 'ok' boolean indicating success, a 'paid' boolean confirming the x402 micro-payment was accepted, and the NFT balance data for the queried address on the specified chain.

Example use cases

Verify NFT ownership for gating

“Check whether wallet 0x1234abcd...5678 holds any NFTs on Base — I need to know if they qualify for our token-gated community.”

Portfolio audit for NFT holdings

“How many NFTs does the wallet 0xdeadbeef...cafe currently have on Base? I'm auditing my on-chain portfolio.”

Agent-triggered NFT balance monitoring

“Every time my agent runs a task, check the NFT balance of 0xAABBCCDD...1122 on Base and alert me if it drops to zero.”

Technical details

Endpoint

GEThttps://x402-toolbox.shablony-pro.workers.dev/chain/nft-balance?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a frictionless, no-signup NFT balance lookup payable per-call in USDC over x402, especially in autonomous agent workflows where managing API keys is undesirable. It is ideal for Base chain queries and micro-payment-native pipelines.

Side effects

Invalid or malformed wallet address returns an error response
Unsupported chain schema returns a bad request
Payment failure (insufficient USDC or wallet issue) prevents the call from executing
Rate limits or Cloudflare Worker timeouts on high-volume requests
Missing required schema parameter results in an ambiguous or empty response

Input

Schema · Request body

Field	Type	Description
schema	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "paid": true
  }
}

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