x402basequality 0.30

x402-gated portfolio transactions endpoint on Base, pay-per-call with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/63/transactions

What it does

This endpoint at lowpaymentfee.com provides access to portfolio transaction data via the x402 payment protocol. The specific resource `/api/v1/portfolios/63/transactions` accepts POST requests and charges up to $0.02 per call in USDC on the Base network. Payment is handled inline via the x402 challenge-response mechanism — no API keys, accounts, or rate limits are required.

The parent site lowpaymentfee.com hosts a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services, all priced at $0.02 per request. However, the specific endpoint being listed here targets portfolio transactions (portfolio ID 63). No further documentation is available describing the request body schema, response format, or the nature of the portfolio data returned. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional technical content.

Because there is no OpenAPI spec, no request/response examples, and no documentation beyond the landing page listing, the exact capabilities and data format of this endpoint remain unclear. Agents calling this endpoint should be prepared to experiment with POST payloads and interpret the response structure at runtime.

Capabilities

x402-paymentusdc-basepay-per-requestportfolio-transactionspost-method

Use cases

  • —Retrieving transaction history for a specific portfolio
  • —Programmatic access to portfolio transaction records without API key management
  • —Agent-driven financial data retrieval with inline micropayments

Fit

Best for

  • —Agents needing keyless, pay-per-call access to portfolio transaction data
  • —Developers experimenting with x402 payment-gated APIs on Base
  • —Automated workflows that need on-demand financial transaction records

Not for

  • —Users who need detailed API documentation or guaranteed schema stability
  • —Bulk data export of large transaction histories (no batch endpoint documented)
  • —Anyone needing free or subscription-based access

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/63/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/63/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 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 documentation beyond a landing page, and the specific purpose of portfolio 63 is unexplained. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no technical content.
  • —No request body schema or response schema documented; callers must guess the POST payload format.
  • —The endpoint targets a hardcoded portfolio ID (63) with no explanation of what this portfolio represents.
  • —No OpenAPI spec or ai-plugin manifest found.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:47:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

JSONhttps://clawmart.sh/api/listings/3Y63bM
x402-gated portfolio transactions endpoint on Base, pay-per-call with USDC. — Clawmart · Clawmart