x402basequality 0.30

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/97/performance

What it does

This endpoint at lowpaymentfee.com returns portfolio performance data for a specific portfolio (ID 97) behind an x402 paywall. It accepts POST requests and responds with JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals).

The provider lowpaymentfee.com hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. This particular endpoint falls under the finance category and appears to deliver portfolio performance metrics, though the exact response schema is not documented.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no example request/response payloads, and no description of what fields the portfolio performance response contains. The endpoint is confirmed live (returns a valid x402 402 challenge), but without documentation it is difficult to know what input parameters are expected or what output is returned.

Capabilities

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

Use cases

  • —Retrieving performance metrics for a tracked portfolio
  • —Integrating portfolio performance data into a dashboard or agent workflow
  • —Programmatic access to portfolio returns without API key management

Fit

Best for

  • —Agents or apps needing on-demand portfolio performance data with micropayments
  • —Developers who want keyless, pay-per-call financial data access on Base

Not for

  • —Users needing detailed API documentation or response schema before integrating
  • —Bulk historical portfolio data retrieval (no documented batch or pagination support)
  • —Non-crypto users who cannot pay via USDC on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/97/performance \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/97/performance
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 challenge, but documentation is essentially nonexistent — no OpenAPI spec, no example requests or responses, no description of the portfolio performance payload. The specific endpoint (portfolios/97) is not even listed on the provider's homepage catalog. This is effectively a stub listing.

Warnings

  • —No API documentation available; docs/pricing/README pages only show 'Connect wallet'
  • —No OpenAPI or response schema provided — response format is unknown
  • —This specific endpoint (/api/v1/portfolios/97/performance) is not listed on the provider's homepage catalog of available APIs
  • —Portfolio ID 97 is hardcoded in the URL; unclear if other portfolio IDs are supported or how they are obtained

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:07:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/sc88Jh
Portfolio performance data via x402 micropayment on Base network, $0.02 per request. — Clawmart · Clawmart