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/5/metadata

What it does

This x402-enabled endpoint at lowpaymentfee.com serves NFT metadata for token ID 5 via a POST request. Payment is settled on the Base network using USDC (contract 0x8335…2913) through the x402 exact-payment scheme. The advertised maximum cost per call is 20,000 base units of USDC, which equals $0.02 (two cents) given USDC's 6-decimal precision.

The provider hosts a broader suite of pay-per-request APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing model with no API keys, no rate limits, and no minimum commitments.

The specific endpoint listed here (/api/v1/nfts/5/metadata) returns application/json content. No OpenAPI schema, request body schema, or response examples are documented, so the exact fields returned in the NFT metadata payload are unknown. The x402 challenge was successfully captured (HTTP 402), confirming the endpoint is live and accepting payment-gated requests.

Capabilities

x402-paymentnft-metadatausdc-settlementbase-networkpay-per-requestno-api-key

Use cases

  • —Retrieving on-chain NFT metadata without managing API keys
  • —Agent-driven NFT data lookups with micropayment settlement
  • —Integrating NFT metadata into wallets or dashboards via x402

Fit

Best for

  • —Developers needing keyless, pay-per-call NFT metadata access
  • —AI agents that can settle x402 payments on Base
  • —Prototyping NFT-aware applications without subscription overhead

Not for

  • —Bulk retrieval of metadata across thousands of NFTs (no batch endpoint documented)
  • —Users who need metadata for NFTs not hosted on this provider
  • —Applications requiring free or subscription-based access

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/nfts/5/metadata \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/nfts/5/metadata
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and confirms pricing and network details, but there is no OpenAPI spec, no documented request/response schema, and no example payloads for this NFT metadata endpoint. The endpoint's actual behavior and returned fields are entirely unknown, making this effectively a stub listing.

Warnings

  • —No OpenAPI or JSON schema available for request or response bodies
  • —No documentation on what NFT metadata fields are returned
  • —The endpoint is for a single hardcoded token ID (5); unclear if other IDs are supported
  • —Provider landing page lists many API categories but no detailed docs were crawlable

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:45:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/z8hXA4
NFT metadata endpoint on Base, pay-per-call via x402 with USDC at $0.02/request. — Clawmart · Clawmart