x402basequality 0.30

Portfolio holdings data via x402 micropayment on Base network for $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/portfolios/64/holdings

What it does

This endpoint at lowpaymentfee.com returns holdings data for portfolio ID 64. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance, 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 maximum amount required per call is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals), paid to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base. No API keys or rate limits are advertised; access is gated purely by micropayment.

Documentation is extremely sparse. The crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the holdings response contains or what POST body (if any) is expected. The endpoint is confirmed live (402 challenge captured), but the actual data returned after payment is unknown from available materials.

Capabilities

x402-paymentusdc-micropaymentbase-networkportfolio-holdingsjson-apipay-per-request

Use cases

  • —Retrieving holdings data for a specific portfolio via micropayment
  • —Integrating portfolio data into agent workflows without API key management
  • —Programmatic access to investment portfolio composition

Fit

Best for

  • —Agents needing on-demand portfolio holdings without subscription commitments
  • —Developers experimenting with x402 micropayment-gated APIs
  • —Low-volume consumers who want pay-per-request pricing

Not for

  • —Users needing detailed API documentation or schema guarantees before integration
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone needing holdings for arbitrary portfolio IDs (this endpoint is scoped to portfolio 64)

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/portfolios/64/holdings \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/portfolios/64/holdings
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages returned only a wallet-connect prompt. The purpose of this specific endpoint (portfolio 64 holdings) is only inferable from the URL path. Effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema describing request body or response format
  • —Endpoint is scoped to a single portfolio ID (64); unclear if other portfolio IDs are available
  • —No information on what 'holdings' data fields are returned after successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:53:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/mrceD9
Portfolio holdings data via x402 micropayment on Base network for $0.02/request. — Clawmart · Clawmart