x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.
What it does
This endpoint at lowpaymentfee.com provides a Stripe invoice-related API resource gated behind the x402 payment protocol. The specific path `/api/v1/stripe/invoices/30` suggests it returns or generates a Stripe invoice (likely invoice #30 or a parameterized invoice resource). Payment is settled on the Base network using USDC (contract 0x8335…2913) at $0.02 per request (20,000 base units with 6 decimals). The endpoint accepts POST requests and returns application/json.
The broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto data feeds, and infrastructure utilities — all priced at $0.02 per request via x402. The platform emphasizes no API keys, no rate limits, and instant access. However, the docs, pricing, and API pages returned only a "Connect wallet" prompt with no substantive documentation, so the actual behavior and response schema of this specific Stripe invoices endpoint remain unclear.
Because there is no OpenAPI spec, no response schema documentation, and no example responses available, the exact data returned by this endpoint is unknown. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepting payments. Users should be aware that the lack of documentation makes it difficult to integrate without trial-and-error.
Capabilities
Use cases
- —Retrieving or generating Stripe invoice data via a crypto-settled pay-per-call model
- —Integrating invoice lookups into agent workflows without API key management
- —Programmatic access to Stripe invoice resources settled on Base L2
Fit
Best for
- —Agents needing on-demand Stripe invoice data without subscription commitments
- —Developers experimenting with x402 payment-gated APIs
- —Workflows requiring crypto-native pay-per-use invoice access
Not for
- —Production integrations requiring documented response schemas and SLAs
- —High-volume invoice processing where per-call pricing adds up
- —Users who need direct Stripe API access with full Stripe feature coverage
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/30 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint is operational. However, there is no OpenAPI spec, no response schema, no example requests or responses, and all documentation pages return only a wallet-connect prompt. The actual functionality of this specific Stripe invoices endpoint is unclear.
Warnings
- —No documentation available — docs, pricing, API, and README pages all return only a 'Connect wallet' prompt
- —No OpenAPI or response schema provided; actual response format is unknown
- —The specific purpose of /api/v1/stripe/invoices/30 is not documented anywhere on the site
- —This endpoint is not listed among the advertised APIs on the homepage
Citations
- —The endpoint returns a 402 x402 challenge with USDC on Base network at 20,000 base units (=$0.02)https://lowpaymentfee.com/api/v1/stripe/invoices/30
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stripe/invoices/30