SDK

Read data and build unsigned transactions in TypeScript.

The SDK is a TypeScript library for Pari. It reads data, builds unsigned transactions and launches tokens. It never sends a transaction unless you call sendAndConfirm.

Pari is live on Solana and built to run on more chains. The SDK works on devnet only today.

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Install

The SDK is not on npm yet, so this command fails today.

npm install @pariprotocol/sdk

The SDK uses version 1 of @solana/web3.js, so keep your project on it. The SDK is an ES module, so use import.

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Read data

apiClient reads the REST API. It is the best way to read many tokens or wallets. It takes no key, and it cannot sign or send.

import { apiClient } from "@pariprotocol/sdk";

const api = apiClient();

const status = await api.status();
console.log(status.cluster, status.indexedSlot);

const page = await api.tokens({ sort: "volume", limit: 5 });
for (const t of page.items) console.log(t.symbol, t.mint, t.volumeTotal);

all walks every page for you:

import { apiClient } from "@pariprotocol/sdk";

const api = apiClient();

for await (const t of api.all((cursor) => api.tokens({ limit: 100, cursor }))) {
  console.log(t.mint, t.holders);
}

Read one token and one wallet:

import { apiClient } from "@pariprotocol/sdk";

const api = apiClient();
const mint = "AgjecsKW5mRCBqRHECFh4iXq6aHzX1hWCCkyFUoWUCVa";
const wallet = "CfkTXZyqRSTM3qMQ97tk6B2Wdf39c4wdaSkferaypKPd";

const token = await api.token(mint);
const trades = await api.trades(mint, { limit: 5 });
const candles = await api.candles(mint, { secs: 3600 });

const held = await api.walletTokens(wallet, { limit: 5 });
const stake = await api.walletStake(wallet);
const rewards = await api.walletRewards(wallet, { limit: 5 });

console.log(token.symbol, trades.items.length, candles.items.length);
console.log(held.items.length, stake.staked, rewards.items.length);

A failed request throws ApiRequestError. A 429 waits for Retry-After and retries twice first.

import { ApiRequestError, apiClient } from "@pariprotocol/sdk";

try {
  await apiClient().token("not-a-mint");
} catch (e) {
  if (e instanceof ApiRequestError) console.log(e.status, e.code, e.message);
}

stream reads the live feed. It reconnects when the connection drops and gives you each event once.

import { apiClient } from "@pariprotocol/sdk";

const signal = AbortSignal.timeout(60_000); // stop after one minute
for await (const e of apiClient().stream(["launches", "trades"], { signal })) {
  console.log(e.event, e.data);
}

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On-chain reads

PariClient reads straight from the chain through an RPC node. Use it when you need the latest state.

connectionFor returns a promise, so await it. It checks that the RPC node is on the right cluster. It uses PARI_RPC_URL when set, or the public devnet RPC.

import { PublicKey } from "@solana/web3.js";
import { PariClient, connectionFor } from "@pariprotocol/sdk";

const connection = await connectionFor("devnet");
const client = new PariClient({ connection });

const mint = new PublicKey("AgjecsKW5mRCBqRHECFh4iXq6aHzX1hWCCkyFUoWUCVa");
const owner = new PublicKey("CfkTXZyqRSTM3qMQ97tk6B2Wdf39c4wdaSkferaypKPd");

const token = await client.token(mint); // null when the mint is not a Pari token
const position = await client.position(owner);
const quote = await client.quote(mint, "buy", 100_000_000n); // 0.1 SOL in lamports

console.log(token?.quote.symbol, position.staked, position.cooling);
console.log(quote.venue, quote.expectedOut, quote.minOut, quote.feeBps);

readTokenFromApi, readStakePositionFromApi, readHolderRewardsOutlookFromApi and readProtocolStatusFromApi return the same types from the API. You can swap the source without changing the code that uses them.

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Build unsigned transactions

Every PariClient write method returns unsigned work. Nothing is sent. You sign with your own wallet.

Method	Returns
client.trade(args)	{ ixs, quote }: the instructions of a buy or a sell
client.stake(owner, amount)	Instructions
client.unstake(owner, amount)	Instructions that start the cooldown
client.withdraw(owner, ids)	Instructions. ids is a list of ticket ids, or "ready".
client.launch(args)	{ tx, mint, pool }: see Launch

amountIn is in base units of the pair for a buy, and in base units of the token for a sell. Tokens have 6 decimals.

This example builds a buy and simulates it. It needs no key and spends nothing. The wallet here is empty, so result.ok is false.

import { Keypair, PublicKey, TransactionMessage, VersionedTransaction } from "@solana/web3.js";
import { PariClient, connectionFor, simulate } from "@pariprotocol/sdk";

const connection = await connectionFor("devnet");
const client = new PariClient({ connection });

const trader = Keypair.generate().publicKey; // use your wallet's address
const mint = new PublicKey("AgjecsKW5mRCBqRHECFh4iXq6aHzX1hWCCkyFUoWUCVa");

const { ixs, quote } = await client.trade({ trader, mint, side: "buy", amountIn: 100_000_000n, slippageBps: 300, maxFeeBps: 500 });

const { blockhash } = await connection.getLatestBlockhash();
const message = new TransactionMessage({ payerKey: trader, recentBlockhash: blockhash, instructions: ixs }).compileToV0Message();
const tx = new VersionedTransaction(message);

const result = await simulate(connection, tx);
console.log(quote.minOut, result.ok, result.unitsConsumed);

A buy in the first moments of a launch pays a high fee that falls over time. trade throws when the fee is over maxFeeBps (default 500). The error has the name FeeTooHighError and a feeBps field. Wait and quote again. See Fees.

To send, call sendAndConfirm(connection, tx, [signer]), or pass the transaction to a wallet.

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Launch

client.launch builds the launch transaction. You generate the mint key yourself.

Field	Meaning
creator	The wallet that pays and becomes the creator.
mint	A Keypair for the new token.
preset	"light", "standard" or "strict". See Presets.
name, symbol, uri	The token name, ticker and metadata URL.
devBuyLamports	The dev buy in base units of the pair. Use 0n for none.
pair	Optional. "SOL" (default) or a stock symbol.
integrator	Optional. The authority of a registered integrator.

The mint key has already signed the result. The creator signs last.

import { readFileSync } from "node:fs";
import { Keypair } from "@solana/web3.js";
import { PariClient, connectionFor, maxDevBuy, sendAndConfirm, simulate } from "@pariprotocol/sdk";

const creator = Keypair.fromSecretKey(Uint8Array.from(JSON.parse(readFileSync(process.env.PARI_KEYPAIR!, "utf8"))));
const mint = Keypair.generate();

const connection = await connectionFor("devnet");
const client = new PariClient({ connection });

console.log("largest dev buy:", await maxDevBuy(connection, "standard"));

const { tx, pool } = await client.launch({
  creator: creator.publicKey,
  mint,
  preset: "standard",
  name: "Cat",
  symbol: "CAT",
  uri: "https://example.com/cat.json",
  devBuyLamports: 0n,
});

const dryRun = await simulate(connection, tx);
if (!dryRun.ok) throw new Error(dryRun.logs.join("\n"));

const signature = await sendAndConfirm(connection, tx, [creator, mint]);
console.log(mint.publicKey.toBase58(), pool.toBase58(), signature);

PARI_KEYPAIR is the path to a keypair file. Never put a key in your code.

A Solana transaction holds at most 1232 bytes, and the launch carries the name, ticker and URI. Keep the URI short. launch throws if the transaction is too large.

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Check a name first

A name can be locked by another token. getNameLock tells you before you launch.

import { connectionFor, getNameLock } from "@pariprotocol/sdk";

const connection = await connectionFor("devnet");
console.log(await getNameLock(connection, "Cat")); // { free, lockedUntil, mint }

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Upload an image and metadata

Registered integrators can use the hosted upload service. It needs PARI_API_KEY. Without a key, host your own metadata and pass its URL as uri.

import { readFileSync } from "node:fs";
import { uploadClient, uploadTokenAssets } from "@pariprotocol/sdk";

const uploads = uploadClient({ apiKey: process.env.PARI_API_KEY! });

const { uri } = await uploadTokenAssets(uploads, {
  imageBytes: readFileSync("./cat.png"),
  contentType: "image/png",
  name: "Cat",
  symbol: "CAT",
  description: "A cat",
});
console.log(uri);

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Launch with a stock pair

A launch can be paired with a tokenized stock instead of SOL. Pass its symbol as pair. devBuyLamports is then in base units of the stock, and the creator must already hold it. Fees of that token are in the stock.

Tokenized stocks are not offered to US persons.

import { loadDeployment } from "@pariprotocol/sdk";

console.log(Object.keys(loadDeployment().pairs ?? {})); // the stock symbols you can pass as pair

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Other exports

• PRESETS: the values of each preset.
• normalize: the name normalization the protocol uses.
• @pariprotocol/sdk/low-level: the raw instruction builders.

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Next

• Quickstart
• CLI
• REST API
• AI tools