x402basequality 0.25

x402-gated backup endpoint on Base, pay $0.02 per request in USDC — no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/backups/39

What it does

This endpoint at `/api/v1/backups/39` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific resource at `/backups/39` is labeled "Premium API Access" but its exact functionality is unclear — the provider's landing page does not list a backups category, and no documentation describes what this particular endpoint returns. The crawled docs, pricing, and README pages all rendered only a wallet-connect prompt with no substantive content.

Payment is handled via the x402 protocol on the Base network. The challenge advertises a maximum amount of 20,000 base units of USDC (contract `0x8335…2913`, 6 decimals), which equals $0.02 per request. Settlement is to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The endpoint accepts HTTP POST, is discoverable, and returns `application/json`. No API key or account registration is required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.

Because the endpoint path (`/backups/39`) does not match any of the documented API categories on the landing page, and no schema or example response is available, the actual data returned is unknown. Prospective callers should treat this as an opaque JSON resource until the provider publishes documentation or an OpenAPI spec.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkjson-responseno-api-keyhttp-post

Use cases

  • —Retrieving a specific backup resource (ID 39) via a single paid POST request
  • —Programmatic access to premium data without managing API keys or subscriptions
  • —Agent-driven workflows that need on-demand paid endpoint access on Base

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use API access settled in USDC on Base
  • —AI agents that can autonomously pay for API calls via x402 protocol
  • —Users who prefer crypto micropayments over traditional subscription billing

Not for

  • —Anyone needing documented, well-specified API contracts — this endpoint lacks public documentation
  • —High-volume batch consumers who need predictable bulk pricing or rate-limit guarantees
  • —Users without a Base-network USDC wallet or x402-compatible client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/39 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/39
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no example request/response, and the /backups/39 path is not listed among the provider's advertised APIs. Effectively a stub listing.

Warnings

  • —Endpoint path /api/v1/backups/39 is not listed on the provider's landing page among documented APIs
  • —No documentation, OpenAPI spec, or response schema available — actual returned data is unknown
  • —All doc/pricing/README pages rendered only a wallet-connect prompt with no content
  • —The label 'Premium API Access' is generic and does not describe the endpoint's function

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 16:06:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4eQbpf
x402-gated backup endpoint on Base, pay $0.02 per request in USDC — no API keys required. — Clawmart · Clawmart