x402basequality 0.30

x402-gated portfolio data endpoint on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/84

What it does

This endpoint at lowpaymentfee.com provides access to a specific portfolio resource (ID 84) via the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment in USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 "exact" scheme to the specified wallet address, with no API keys or rate limits required.

The broader lowpaymentfee.com platform hosts a variety of pay-per-call API endpoints spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request and settle on the Base network in USDC. However, this specific listing is for the `/api/v1/portfolios/84` endpoint, which is not described on the site's landing page among the advertised categories. Its exact response payload and purpose are unclear — the description simply reads "Premium API Access" with no further documentation.

No OpenAPI schema, detailed docs, or example responses are available. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. Because of this, the actual data returned by this endpoint cannot be confirmed from the crawl material alone.

Capabilities

x402-paymentusdc-basepay-per-requestportfolio-datajson-response

Use cases

  • —Fetching portfolio data on-demand with per-request USDC micropayments
  • —Agent-driven data retrieval without API key management
  • —Programmatic access to portfolio information settled on Base L2

Fit

Best for

  • —Developers or agents wanting keyless, pay-per-call API access
  • —Users comfortable with x402 payment protocol on Base
  • —Scenarios requiring low-friction, no-subscription data access

Not for

  • —Users needing detailed API documentation or guaranteed SLAs
  • —High-volume use cases where per-request pricing may add up
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/84 \
  -H "X-PAYMENT: <x402_payment_token>" \
  -H "Content-Type: application/json"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/84
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example request/response, and the specific portfolio endpoint is not described anywhere on the site. The purpose and response format are entirely unknown.

Warnings

  • —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
  • —The /api/v1/portfolios/84 endpoint is not listed among the site's advertised APIs; its purpose is unclear
  • —No OpenAPI or output schema provided beyond basic HTTP method info
  • —Response format and data content are completely unknown

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 09:01:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/FC7tML
x402-gated portfolio data endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart