x402basequality 0.25

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/44/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/44/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 header mechanism — no API keys, accounts, or rate limits are required.

The endpoint is part of a broader platform (lowpaymentfee.com) that offers a variety 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 listing covers only the portfolio transactions resource. The x402 challenge confirms the endpoint is live, accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.

Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the transactions endpoint accepts or returns. The endpoint's actual functionality (what portfolio 44 is, what transaction data is returned, what POST body is expected) is entirely unknown from the available material.

Capabilities

x402-paymentusdc-basepay-per-requestportfolio-transactionspost-endpoint

Use cases

  • —Fetching transaction history for a specific portfolio via micropayment
  • —Integrating pay-per-call portfolio data into agent workflows
  • —Accessing financial transaction data without API key registration

Fit

Best for

  • —Agents needing keyless, pay-per-call access to portfolio transaction data
  • —Developers experimenting with x402 payment protocol integrations
  • —Use cases where avoiding API key management is valuable

Not for

  • —Production systems requiring documented request/response schemas
  • —Users needing bulk or high-volume transaction data at lower per-call cost
  • —Anyone needing clarity on what data is actually returned before paying

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/44/transactions
# Returns 402 with x402 payment challenge.
# Include X-PAYMENT header with valid USDC payment on Base to access.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/44/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content
  • —No OpenAPI or request/response schema provided; request body format and response structure are completely unknown
  • —The purpose of 'portfolios/44' is unexplained — it is unclear whether this is a demo, a specific user portfolio, or a generic resource
  • —Platform appears to list many endpoints but none have visible documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:38:47Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-28

Agent access

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