x402basequality 0.35

NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/nfts/29/metadata

What it does

This endpoint serves NFT metadata for token ID 29 from the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network.

The specific endpoint at `/api/v1/nfts/29/metadata` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is gated entirely by the x402 micropayment.

The provider's landing page lists a uniform $0.02/request price across all endpoints. Documentation beyond the landing page is minimal — the /api, /pricing, and /README routes all resolve to a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The actual content of the NFT metadata returned is unknown from the available material.

Capabilities

nft-metadatax402-paymentusdc-settlementbase-networkpay-per-requestjson-response

Use cases

  • —Retrieving metadata for NFT token ID 29 programmatically
  • —Integrating NFT metadata into a dApp or marketplace UI
  • —Demonstrating x402 micropayment-gated API access

Fit

Best for

  • —Developers needing on-demand NFT metadata without API key management
  • —Agents or bots that can settle x402 payments in USDC on Base
  • —Quick, low-cost single-request metadata lookups

Not for

  • —Bulk retrieval of metadata across many NFT collections (only token 29 is exposed at this path)
  • —Users who need detailed documentation or OpenAPI specs before integrating
  • —Applications requiring non-USDC or non-Base payment rails

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/29/metadata \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/29/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no example payloads, and no documentation beyond a landing page listing. The actual content returned after payment is entirely unknown.

Warnings

  • —No OpenAPI or schema documentation available
  • —No example request or response bodies; actual NFT metadata content is unknown
  • —Provider docs pages (/api, /pricing, /README) all return only a 'Connect wallet' prompt with no useful information
  • —This endpoint is scoped to a single NFT token ID (29); generalizability is unclear

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 23:33:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/uNeVCy
NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request. — Clawmart · Clawmart