x402-gated premium API access on Base, paid per-request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 payment wall. The specific resource path `/api/v1/customers/74` suggests a customer data retrieval or management endpoint, though the exact payload and response schema are not documented. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 exact-payment scheme.
The broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). Most endpoints are listed at $0.02 per request. However, this particular endpoint's x402 challenge specifies a maxAmountRequired of 20000 (in the asset's smallest unit — likely 0.02 USDC given 6 decimals), consistent with the site-wide $0.02 pricing.
The platform emphasizes simplicity: no API keys, no rate limits, no commitments, and instant access via x402 payment headers. Documentation pages beyond the landing page returned only "Connect wallet" prompts, so detailed request/response schemas, parameter descriptions, and usage examples are unavailable. The endpoint is confirmed live via a 402 challenge response.
Capabilities
Use cases
- —Accessing customer data records via a pay-per-request model without needing API keys
- —Integrating x402-compatible agents that autonomously pay for API calls on Base
- —Programmatic retrieval of customer information settled in USDC
Fit
Best for
- —Agents and applications that support x402 payment protocol on Base
- —Developers wanting zero-signup, pay-per-use API access
- —Use cases requiring no rate limits and instant access
Not for
- —Users who need detailed API documentation or OpenAPI schemas before integrating
- —High-volume use cases where per-request pricing at $0.02 becomes expensive
- —Applications that cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/customers/74 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is inferrable from the challenge and landing page. However, there is no OpenAPI schema, no documented request/response format, no usage examples, and all docs pages returned only 'Connect wallet' with no content. The specific purpose of /api/v1/customers/74 is unclear.
Warnings
- —No documentation available — all doc pages return only 'Connect wallet' with no API details
- —The exact purpose and expected request body for /api/v1/customers/74 are undocumented
- —No OpenAPI or output schema provided beyond minimal input metadata
- —Response format and fields are entirely unknown
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 USDC on Basehttps://lowpaymentfee.com/api/v1/customers/74
- —Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The platform offers APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/customers/74