# Synapse API — Ink NFT Metadata Lookup

> Synapse API — Ink NFT Metadata Lookup 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 2026-09-15).

Retrieves NFT metadata for a given token ID and contract address on the Ink blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/ink/nft/metadata
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-ink-nft-metadata-lookup-a6177948
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_B-ktGseN88va8vyY5h5Tw

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synapse-api-ink-nft-metadata-lookup-a6177948 -d '<json body>'
```

Example prompt: Can you pull the metadata for token ID 1042 from the NFT contract at 0xAbC123...def456 on the Ink blockchain — I want to see the name, image, and any trait attributes it has?

## When to prefer this

Use this endpoint when you need to fetch on-chain NFT metadata specifically from the Ink blockchain network. Prefer this over generic NFT metadata APIs when your target contract is deployed on Ink and you want fast, pay-per-call access without API key setup overhead.

## Known failure modes

- Invalid or non-existent contract address returns an error or empty response
- Token ID does not exist on the specified contract, resulting in a not-found error
- Contract address belongs to a non-NFT contract, leading to unexpected or malformed output
- Network issues with the Ink blockchain RPC cause timeout or unavailability
- Malformed tokenId or contractAddress input triggers a validation error

## 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 NFT metadata associated with the given token ID and contract address on the Ink network, typically including the token name, description, image URL, and a list of attributes or traits as defined in the token's metadata URI.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tokenId": {
   "type": "string"
  },
  "contractAddress": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-ink-nft-metadata-lookup-a6177948/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)