x402basequality 0.82

Get NFT collection metadata including market stats, holders, events, and sample NFTs via Zapper's onchain data API.

Price
per_call
Protocol
x402
Verified
no
Endpoint
https://public.zapper.xyz/x402/nft-collection-metadata

What it does

This endpoint returns comprehensive NFT collection data from Zapper's onchain data platform. Given one or more collection contract addresses and chain IDs, it returns collection name, network, floor price (in USD), market cap, holder count, a paginated list of NFTs in the collection, recent collection events, and top holders. It supports collections across 60+ chains.

The endpoint is part of Zapper's x402-enabled API suite. Payment is $0.001125 per request, settled in USDC on Base (chain 8453) via the x402 protocol. The request body accepts a `collections` array, where each entry specifies an `address` (the 0x contract address) and a `chainId` (e.g., 8453 for Base, 1 for Ethereum mainnet). Multiple collections can be queried in a single call.

The response wraps data under `nftCollectionsV2`, returning an array of collection objects. Each object includes fields like `name`, `address`, `network`, `floorPrice.valueUsd`, `marketCap`, `holdersCount`, plus nested `nfts`, `events`, and `holders` objects. This endpoint is live and returns a valid x402 payment challenge (HTTP 402) when called without payment.

Capabilities

nft-collection-metadatanft-floor-pricenft-market-capnft-holdersnft-eventsmulti-chainx402-paymentbatch-collection-query

Use cases

  • —Retrieve floor price and market cap for an NFT collection before making a purchase decision
  • —Build a dashboard showing holder distribution and recent events for multiple NFT collections
  • —Monitor NFT collection stats across multiple chains in an automated agent workflow
  • —Enrich NFT collection data in a portfolio tracker with holder counts and sample NFTs
  • —Compare market stats across several NFT collections in a single batched request

Fit

Best for

  • —Agents needing structured NFT collection market data across 60+ chains
  • —Portfolio and analytics tools requiring floor price, market cap, and holder data
  • —Developers building NFT dashboards who want pay-per-call pricing without API keys

Not for

  • —Fetching metadata for individual NFT tokens (use nft-token-metadata instead)
  • —Free or high-volume bulk scraping of NFT data (each call costs $0.001125)
  • —Non-EVM chains or collections not indexed by Zapper

Quick start

curl -X POST https://public.zapper.xyz/x402/nft-collection-metadata \
  -H "Content-Type: application/json" \
  -H "X-Payment: <x402-payment-token>" \
  -d '{"collections":[{"address":"0xa449b4f43d9a33fcdcf397b9cc7aa909012709fd","chainId":8453}]}'

Example

Request

{
  "collections": [
    {
      "address": "0xa449b4f43d9a33fcdcf397b9cc7aa909012709fd",
      "chainId": 8453
    }
  ]
}

Response

{
  "data": {
    "nftCollectionsV2": [
      {
        "name": "Example Collection",
        "nfts": {},
        "events": {},
        "address": "0xa449b4f43d9a33fcdcf397b9cc7aa909012709fd",
        "holders": {},
        "network": "BASE_MAINNET",
        "marketCap": 125000,
        "floorPrice": {
          "valueUsd": 12.5
        },
        "holdersCount": 4200
      }
    ]
  }
}

Endpoint

URLhttps://public.zapper.xyz/x402/nft-collection-metadata
Transporthttp
Protocolx402
Pay to0x43a2a720cd0911690c248075f4a29a5e7716f758
CurrencyUSD COIN

Quality

0.82/ 1.00

Full OpenAPI schema with input/output descriptions, live 402 challenge captured, clear pricing, and example request body are all present. Docked slightly because no actual 200 response example is available (output schema is illustrative only) and crawled docs pages returned 404s.

Warnings

  • —The legacy Zapper API at /api is marked with a deprecation notice pointing to build.zapper.xyz; the x402 endpoints appear to be the current offering.
  • —No actual 200 response body was captured; the output schema is inferred from the Bazaar extension's example structure.
  • —Crawled /docs, /pricing, and /README all returned 404; documentation is only available via the OpenAPI spec.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 01:12:14Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/zNa37Y