DeFi liquidity data for APT via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides DeFi liquidity data for the APT token (Aptos). It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure APIs, all gated behind the x402 payment protocol on the Base network.
The endpoint accepts POST requests and returns JSON. Payment is settled in USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is paid individually via the X-PAYMENT header.
Documentation on the site is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what fields the liquidity endpoint returns. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to know exactly what data is returned or what request body (if any) is expected.
Capabilities
Use cases
- —Querying current liquidity metrics for the APT token across DeFi protocols
- —Building dashboards that display APT liquidity depth in real time
- —Automated trading bots that check APT liquidity before executing swaps
- —Research and analytics on Aptos ecosystem DeFi activity
Fit
Best for
- —Agents or bots that need on-demand DeFi liquidity data without managing API keys
- —Developers building Aptos-related DeFi tools who want pay-per-call pricing
- —Quick, low-commitment access to APT liquidity information
Not for
- —Users who need comprehensive multi-token DeFi analytics in a single call
- —Anyone requiring detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk/subscription pricing
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/defi/APT/liquidity \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs ('Connect wallet' only). The actual data returned by the endpoint is unknown, making this effectively a stub listing.
Warnings
- —No API documentation available — /docs, /api, /pricing, and /README all return only 'Connect wallet' with no content.
- —No OpenAPI or output schema describing the response format.
- —No request body schema documented; unclear if a POST body is required or what fields it accepts.
- —The platform lists many diverse API categories (AI, geocoding, finance, etc.) all at $0.02 — unclear if all endpoints are fully implemented or placeholders.
Citations
- —Endpoint returns 402 with x402 challenge, confirming it is live on Base network with USDC paymenthttps://lowpaymentfee.com/api/v1/defi/APT/liquidity
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per requesthttps://lowpaymentfee.com/api/v1/defi/APT/liquidity
- —Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/defi/APT/liquidity