d21 Token Price

x402

d21 Token Price is a paid API for AI agents from draconic21-x402-api.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).

Returns on-chain token prices for curated majors via Chainlink or any Base ERC-20 via Uniswap V3 pool discovery, with optional batch lookup by symbol or address

Price / call$0.003

Seller volume →—

Success—

StatusUnknown

How this service works

Token Price ($0.003): Base token price derived from on-chain state, not a resold price-API feed. Curated majors (ETH, WETH, USDC, DAI, cbETH, cbBTC, BTC) are priced from Chainlink's own Data Feed aggregator contracts on Base; any other Base ERC-20 address is priced from its deepest discoverable Uniswap V3 pool against USDC (with a liquidity read and a low-liquidity flag), or a clean unsupported-token error if no pool is discoverable. Also accepts { coins }, a comma-separated batch of symbols…

Output

Returns the token price in USD (or ETH if specified), sourced from Chainlink aggregator contracts for curated majors or the deepest discoverable Uniswap V3 USDC pool for arbitrary Base ERC-20s. Includes a low-liquidity flag when pool depth is thin, or a clean error if no pool is discoverable for the requested address.

Example use cases

DeFi portfolio valuation snapshot

“Give me the current on-chain prices for ETH, WETH, USDC, and cbBTC in USD so I can value my Base wallet holdings right now.”

Arbitrary Base token price check

“What's the current price of the Base ERC-20 token at address 0x4200000000000000000000000000000000000006 in USD, and is there enough liquidity to trust the price?”

Multi-token batch price feed for trading bot

“Fetch on-chain prices for BTC, ETH, DAI, and cbETH all at once in USD — I need to check spreads across these four assets before placing trades.”

Technical details

Endpoint

POSThttps://draconic21-x402-api.onrender.com/v1/token_price?utm_source=zero.xyz

When to prefer

Prefer this endpoint when you need verifiable on-chain token prices rather than centralized price-API feeds, especially for tokens on the Base network including arbitrary ERC-20s not listed on major exchanges. It is the right choice when you need Chainlink-grade reliability for curated majors (ETH, WETH, USDC, DAI, cbETH, cbBTC, BTC) or want automated Uniswap V3 pool discovery for long-tail Base tokens. Choose it over generic price APIs when on-chain provenance and liquidity awareness matter.

Side effects

No Uniswap V3 pool discoverable for the given address — returns unsupported-token error
Low liquidity on the discovered pool — price returned with low-liquidity flag set
Invalid or malformed ERC-20 address — input validation error
More than 10 tokens in coins batch — rejected with limit error
Mutually exclusive params (symbol + address, or symbol + coins) used together — input conflict error
Chainlink feed temporarily unavailable — may return stale or error response

Input

Schema · Request body

Field	Type	Description
coins	string	Comma-separated batch of symbols and/or 0x addresses, up to 10 (e.g. 'BTC,ETH,0x...') — same param name the category-leading incumbent uses. Mutually exclusive with symbol/address.
quote	string	Quote currency, default USD.
symbol	string	Curated major token symbol: ETH, WETH, USDC, DAI, CBETH, CBBTC, or BTC. Mutually exclusive with address/coins.
address	string	Any Base ERC-20 contract address (0x...), priced from its deepest live Uniswap V3 USDC pool. Mutually exclusive with symbol/coins.

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