x402basequality 0.30

x402-gated portfolio transactions endpoint on Base, paid per-call in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/50/transactions

What it does

This endpoint at lowpaymentfee.com provides access to portfolio transaction data via a POST request to `/api/v1/portfolios/50/transactions`. It is part of a broader platform (lowpaymentfee.com) that offers a variety of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities.

The specific endpoint is gated by the x402 payment protocol on the Base network. Each call costs up to 0.02 USDC (maxAmountRequired of 20,000 base units with 6 decimals for USDC). Payment is made via the `exact` scheme to a designated wallet address, settling in USDC (contract 0x8335…2913 on Base). No API keys or rate limits are advertised; access is granted per-request upon valid payment.

Documentation is extremely sparse. The landing page lists available endpoints and pricing but the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the transactions endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what data to POST or what response to expect.

Capabilities

x402-paymentper-call-pricingusdc-settlementbase-networkportfolio-transactionspost-endpoint

Use cases

  • —Retrieving portfolio transaction records via a pay-per-call model
  • —Integrating x402-gated financial data into agent workflows
  • —Accessing transaction data without API key registration

Fit

Best for

  • —Developers experimenting with x402 payment protocol integrations
  • —Agents that need keyless, pay-per-request access to portfolio data
  • —Projects already operating on the Base L2 network with USDC

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk/subscription pricing
  • —Anyone without USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/50/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/50/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing (0.02 USDC per call). However, there is no OpenAPI schema, no request/response examples, and all documentation pages render only a wallet-connect prompt. The purpose of this specific endpoint (portfolio 50 transactions) is unclear without further docs.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown
  • —All doc/pricing/README pages return only a 'Connect wallet' prompt with no usable content
  • —The endpoint path references a hardcoded portfolio ID (50); unclear if this is parameterizable
  • —Purpose and data returned by this specific endpoint are not documented anywhere in the crawl

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:34:21Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/6BZSHK
x402-gated portfolio transactions endpoint on Base, paid per-call in USDC. — Clawmart · Clawmart