x402basequality 0.35

Portfolio performance data via x402 micropayment on Base network, $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/24/performance

What it does

This endpoint at lowpaymentfee.com returns portfolio performance data for portfolio ID 24. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all settled via the x402 protocol on the Base network using USDC.

The endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact scheme. The max amount required is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is independently paid. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what fields the portfolio performance response contains. The endpoint is confirmed live (402 challenge returned), but the actual data contract is unknown.

Capabilities

x402-paymentusdc-base-networkportfolio-performancepay-per-requestno-api-keyjson-response

Use cases

  • —Retrieving performance metrics for a specific investment portfolio
  • —Integrating portfolio performance data into dashboards or agent workflows
  • —On-demand portfolio analytics without subscription overhead

Fit

Best for

  • —Agents needing one-off portfolio performance lookups via micropayment
  • —Developers who want keyless, pay-per-call access to financial data
  • —Crypto-native workflows already on the Base network

Not for

  • —Users needing bulk or historical portfolio data across many portfolios (only portfolio 24 is exposed at this path)
  • —Anyone requiring detailed API documentation or guaranteed SLAs
  • —Non-crypto users who cannot settle USDC payments on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/24/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/24/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing. The actual data returned is completely unknown, and only a single portfolio ID (24) is referenced. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, API, and README pages all return only a wallet-connect prompt
  • —No request or response schema provided; the data contract is unknown
  • —Only portfolio ID 24 is referenced at this specific endpoint; unclear if other portfolio IDs are supported
  • —No OpenAPI spec or ai-plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:23:43Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/f7z6t6
Portfolio performance data via x402 micropayment on Base network, $0.02 per request. — Clawmart · Clawmart