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/75/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/75/transactions` accepts POST requests and charges up to $0.02 per call in USDC on the Base network. Payment is handled entirely through the x402 challenge-response flow — no API keys or accounts are required.

The hosting site lowpaymentfee.com advertises 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, this specific endpoint targets portfolio #75's transactions, and no further documentation about the request body schema, available query parameters, or response format was found in the crawl. The docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content.

Because the endpoint returned a well-formed 402 challenge with x402 version 1, it is confirmed live. The payment is settled in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3, with a maximum timeout of 300 seconds. Without request/response schema documentation, callers will need to experiment or contact the provider to understand the expected POST body and the shape of the returned transaction data.

Capabilities

x402-paymentusdc-baseportfolio-transactionspay-per-requestno-api-key

Use cases

  • —Fetching transaction history for a specific portfolio via micropayment
  • —Integrating portfolio transaction data into an agent workflow without API key management
  • —Programmatic access to financial transaction records with per-call USDC settlement

Fit

Best for

  • —Agents or bots that need on-demand portfolio transaction data without subscription commitments
  • —Developers experimenting with x402 payment-gated APIs on Base
  • —Low-volume consumers who prefer pay-per-request over monthly plans

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume batch processing where per-request pricing may add up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/75/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/75/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid 402 challenge, but there is no documentation on request body schema, response format, or what 'portfolio 75 transactions' actually returns. Docs pages are empty. This is effectively a stub listing.

Warnings

  • —No request or response schema documented — callers must guess the POST body format
  • —All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no content
  • —The endpoint is scoped to portfolio ID 75; it is unclear whether other portfolio IDs are available or what this portfolio represents
  • —No OpenAPI spec or ai-plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:49:55Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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