How to get the price of a DEX pair

The short way

Ask a pool indexer, not a node. Both of the free ones answer an unauthenticated HTTP request with a pair's current price.

GET https://api.dexscreener.com/latest/dex/pairs/{chainId}/{pairId}
GET https://api.geckoterminal.com/api/v2/networks/{network}/pools/{pool_address}

DEX Screener is the quicker lookup and documents 60 requests a minute on every endpoint it publishes. GeckoTerminal is slower — its FAQ puts the public API at 30 calls a minute — and covers more ground: 228 networks and 1,978 DEXes against DEX Screener's 64 chains, and it publishes a pool OHLCV endpoint, which DEX Screener does not.

Neither needs a key, an account or a wallet. If what you want is one number for one pool right now, you are finished in one request, and the rest of this page is about why that number is not what it looks like.

What the options are

A keyless pool lookup. The two above. Use them when you have a pair or token address and want its current state — price, liquidity, 24-hour volume, buy and sell counts. GeckoTerminal when you also want a time series or a chain the other does not carry; DEX Screener when you want the answer in one call and will poll it yourself.

The same data on a plan. The CoinGecko API sells the on-chain surface — pool and token OHLCV, top token holders, wallet balances — on the same keyed ladder as its off-chain one. That is the reason to pay for it: not more pools, but one vendor, one key and one rate limit for a job that needs a pool quote sitting next to an asset price.

The swaps underneath. Bitquery answers GraphQL over decoded DEX trades, which is what you need when the summary is not the question — a particular wallet's fills, a sequence of swaps, a token's first hour. Read the retention line before you plan around it: on self-service, trades, prices and OHLC keep 30 days, and raw on-chain data keeps four hours on EVM chains and eight on Solana. Complete history is a per-chain add-on.

A query rather than a lookup. Dune has curated cross-protocol tables — dex.trades, dex_aggregator.trades, sandwich tables, and on Solana a set with its own shape including dex_solana.trades and Jupiter aggregator swaps. Use it when the question is comparative or historical, and accept that you now own the definition of whatever you computed.

Where this breaks

A pool quote is not a price. It is the marginal rate for an infinitesimal trade against the current reserves, and it is the one size nobody trades. The real price for your order is a walk along the curve, and how far it walks is set by the pool's depth rather than by anything about the token: in a pool holding a few tens of thousands of dollars, an ordinary order is the market event. The quoted figure and the achievable figure diverge continuously as size grows, and nothing in a priceUsd field tells you where that happens. If the number is going into a valuation, the question to ask is not "what is the price" but "at what size does this stop being true".

There is no such thing as the pool. A token trades in as many pools as anyone has deployed, on as many chains as it has been bridged to, and each one quotes independently. So every product that prints one price per token has made a selection, and GeckoTerminal is unusually direct about what its selection is: price_usd is the USD price of the token in the first pool listed under top_pools. That is a ranking decision presented as a market fact. It is the same problem the CEX side has, one layer down — where the Bitcoin price comes from is the long version, and it applies harder here, because a pool cannot be a reference rate and a ranking is not a methodology.

Two currencies, and one of them may be missing. DEX Screener's pair schema carries priceNative and priceUsd separately, and priceUsd is explicitly nullable. The native figure is what the contract quotes; the dollar figure is that number routed through somebody's estimate of what the quote asset is worth. Every dollar price of an on-chain pair is a conversion with another price inside it, and the inner one has the same problems as the outer one.

The quote and the fill are separated by a block. A pool's spot price is whatever the last transaction in the current block left it at, which means it can be moved and moved back within the same block by anyone who can order transactions. This is not a fringe concern: Uniswap's own documentation is built around it, describing the v3 oracle's maximum length as making "oracle price manipulation significantly more difficult, as the calling contract may cheaply construct a time-weighted average over any arbitrary range". If a contract you are writing should not read a spot tick, neither should a number you are about to publish. Read a time-weighted average, or read the trades and compute one.

Nothing here is filtered for you. GeckoTerminal will return tokens that are not on CoinGecko at all, with its own warning attached — "you need to know what you are doing since these tokens may be spams". Its GT Security Score, which carries contract verification, honeypot checks and holder concentration, is the clearest thing separating a pool table from a price feed, and it is a score rather than a guarantee. An address that quotes a price is not a token anybody wants.

If you outgrow this

If the problem is that you are polling, buy the plan rather than the pool: the CoinGecko API's on-chain endpoints exist precisely so that a production job has a key, a quota and a support address instead of a public endpoint's 30 calls a minute.

If the problem is that the number has to be defensible — it is going into a mark, a report or somebody else's screen — then stop reading pools and read trades. Bitquery and Dune both give you the swaps; the definition of the price is then yours, written down, and reproducible, which is the only form of it that survives being questioned.

If the problem is which screener to pay for, check how the tier is sold before comparing it to anything. DEX Screener is paid for by token promotion rather than by you, and two of DEXTools' three tiers are unlocked by holding the vendor's own token rather than by paying a fee — which is a cost, and not one you can put beside a monthly price. A token threshold is not a price is why.

And if the problem is chain coverage, that is the one thing the free tier does not gate: GeckoTerminal's 228 networks are free to read. What is not uniform is everything behind the pool table, which the Solana shelf and the DeFi shelf are the two clearest cases of.