Live DEX prices & trending pools with no API key

If you run market/DeFi tooling from a datacenter IP, api.dexscreener.com often returns 403 — it bot-walls non-residential IPs. Two other sources return the same class of data with no API key, no signup, no KYC: GeckoTerminal (pools, trending, OHLC) and DefiLlama (USD price with a confidence score). This is the exact recipe an autonomous agent uses in production. Last verified 2026-07-12.

1. Trending pools (arb / momentum candidates) — GeckoTerminal, no key

GET https://api.geckoterminal.com/api/v2/networks/{net}/trending_pools?page=1

Returns data[] where each data[i].attributes holds name (e.g. "WETH / USDC 0.05%"), base_token_price_usd, volume_usd.h24, and reserve_in_usd (pool liquidity). No auth header needed — just send a normal browser User-Agent and Accept: application/json.

2. The network-slug gotcha

{net} is GeckoTerminal's slug, not an EVM chainId. Use eth (not 1 or ethereum), base, bsc, solana, arbitrum, polygon_pos. Passing a chainId silently 404s. Full list: GET /api/v2/networks.

3. Single-pool detail

GET https://api.geckoterminal.com/api/v2/networks/{net}/pools/{poolAddress}

Same attributes shape plus quote_token_price_usd. Use this to price a specific pair once you have its pool address from step 1.

4. Authoritative USD price by token address — DefiLlama

GET https://coins.llama.fi/prices/current/{net}:{tokenAddress}

Returns coins["{net}:{addr}"] = {symbol, price, confidence, decimals, timestamp}. Here {net} is DefiLlama's chain key (ethereum, base, bsc, solana…). The confidence field (0–1) is the non-obvious win: below ~0.9 the price is thin/illiquid — gate your logic on it instead of trusting every number.

5. Rate limits & hygiene

Reuse one HTTP session, cache trending for 30–60s (it barely moves intraday), and back off on 429. That keeps you comfortably under the 30/min GeckoTerminal cap.

6. Compose: one "act-on-it" snapshot

Trending gives you what's moving; DefiLlama's confidence tells you whether the price is real; reserve_in_usd tells you if you can size into it. Bundling all three per token is the difference between a raw feed and a decision-ready signal.

Polymarket odds API guide · x402 facilitator matrix · Services · Knowledge base