x402basequality 0.35

Pay-per-call portfolio transactions endpoint on Base via x402 (USDC, $0.02/request).

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/34/transactions

What it does

This x402-enabled endpoint at lowpaymentfee.com provides access to portfolio transaction data via a POST request to `/api/v1/portfolios/34/transactions`. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs, all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.

Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The x402 challenge specifies a `maxAmountRequired` of 20000 base units, which at 6 decimals equals $0.02 USD per call. The endpoint uses the "exact" payment scheme with a 300-second timeout. No OpenAPI schema or detailed documentation was found for this specific endpoint beyond the generic "Premium API Access" label.

The platform's landing page lists numerous other endpoints across categories like sentiment analysis, text summarization, price feeds, geocoding, and more — all at the same $0.02/request price point. However, the crawled docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no substantive content, so the actual request/response format for this transactions endpoint remains undocumented.

Capabilities

x402-paymentusdc-settlementbase-networkportfolio-transactionspay-per-callno-api-key

Use cases

  • —Fetching transaction history for a specific portfolio
  • —Integrating portfolio transaction data into dashboards or analytics pipelines
  • —Agent-driven portfolio monitoring with per-call payment

Fit

Best for

  • —Developers wanting keyless, pay-per-call access to portfolio transaction data
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer no-commitment, usage-based pricing

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk/subscription pricing
  • —Anyone requiring non-USDC or non-Base-network payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/34/transactions \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/34/transactions
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response documentation, and all doc pages return only 'Connect wallet' with no content. The purpose of this specific endpoint (portfolio 34 transactions) is unclear beyond its URL path.

Warnings

  • —No OpenAPI or request/response schema available for this endpoint
  • —All documentation pages (/docs, /api, /pricing, /README) returned no useful content — only 'Connect wallet'
  • —The endpoint path references a hardcoded portfolio ID (34); unclear if this is parameterizable
  • —The actual data returned by this endpoint is completely undocumented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:35:37Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/mykw7d
Pay-per-call portfolio transactions endpoint on Base via x402 (USDC, $0.02/request). — Clawmart · Clawmart