Crypto token data endpoint (USDT) payable per-request via x402 on Base network.
What it does
This endpoint at lowpaymentfee.com provides token-related data for USDT, accessible via the x402 payment protocol on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals), settled on-chain to a specified wallet address. No API keys, rate limits, or subscriptions are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider hosts a broader suite of APIs spanning data & analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints follow the same $0.02-per-request pricing model and x402 payment flow on Base.
Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific behavior of the `/api/v1/tokens/USDT` endpoint (what fields it returns, what parameters it accepts) is unknown beyond the x402 challenge metadata.
Capabilities
Use cases
- —Fetching USDT token data or metadata on demand with per-call crypto payment
- —Agent-driven workflows that need token information without managing API keys
- —Programmatic access to token data settled via on-chain micropayments
Fit
Best for
- —Developers or agents wanting keyless, pay-per-call token data
- —x402-compatible agent wallets on the Base network
- —Low-volume or sporadic queries where subscription pricing is wasteful
Not for
- —High-volume production use cases requiring documented SLAs and schemas
- —Users who need detailed API documentation or client libraries before integrating
- —Non-crypto users who cannot settle payments on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/USDT \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The actual functionality of the /tokens/USDT endpoint is entirely undocumented.
Warnings
- —No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no technical content.
- —No OpenAPI or schema definition found; request parameters and response format are unknown.
- —The specific data returned by /api/v1/tokens/USDT is not documented anywhere in the crawled material.
- —Provider appears to be a generic x402 API storefront; actual backend data sources and reliability are unclear.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 base units.https://lowpaymentfee.com/api/v1/tokens/USDT
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The USDC asset address used is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.https://lowpaymentfee.com/api/v1/tokens/USDT