x402basequality 0.30

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/351

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.

The specific endpoint `/api/v1/transactions/351` is listed under the site's premium access tier. It accepts POST requests and requires an X-PAYMENT header containing a valid x402 payment proof. The maximum amount required is 20,000 base units of USDC (0.02 USD given 6 decimals), paid to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base. No API keys or rate limits are advertised; access is gated purely by payment.

Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. The exact functionality of the `/api/v1/transactions/351` endpoint is unclear beyond its generic "Premium API Access" label. The site's landing page lists many endpoint categories but does not include this specific path, so its purpose cannot be confirmed from available material.

Capabilities

x402-paymentusdc-basepay-per-requestpost-methodno-api-key

Use cases

  • —Programmatic access to premium data or services without subscription
  • —Agent-driven API consumption with per-call crypto payment
  • —Testing x402 payment flows on Base network

Fit

Best for

  • —Developers wanting keyless, pay-per-use API access
  • —AI agents with x402 payment capability on Base
  • —Users who prefer no-subscription, no-rate-limit API consumption

Not for

  • —Users needing detailed documentation or guaranteed SLAs
  • —Anyone without USDC on Base network
  • —Use cases requiring known, well-documented response schemas

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/351 \
  -H "X-PAYMENT: <x402_payment_proof>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/351
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns 402 challenge correctly) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no response schema, no example payloads, and the specific purpose of /api/v1/transactions/351 is unknown. The docs pages are empty beyond a wallet connect prompt.

Warnings

  • —No documentation available — docs/pricing/README pages only show 'Connect wallet'
  • —The exact functionality of /api/v1/transactions/351 is undocumented and unclear
  • —No response schema or example responses provided
  • —Cannot verify what data or service is actually returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:24:03Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/HmvnLM
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart