@anaxer/sdk

@anaxer/sdk

Official TypeScript client for the Anaxer Solana real-time data API — typed WebSocket streams and REST reads over the public /v1 contracts.

Requires Node ≥ 20. ESM and CommonJS builds ship together.

npm install @anaxer/sdk

Quickstart

import { connect } from "@anaxer/sdk";

const client = connect({ apiKey: process.env.ANAXER_API_KEY! });

client.stream("creations", { excludeMayhem: true }).on("data", (token) => {
  console.log("new launch:", token.symbol, token.mint);
});

const price = await client.tokens.price("3PFaeFMXiRVYueDCnHHSKndKDDpKZhbhFjQ13JXYpump");

connect() returns immediately. The WebSocket opens on the first stream() call (or await client.ready()). Auth is Authorization: Bearer for both WS and REST.

Wire contracts: docs/api/ws-v1.md, docs/api/rest-v1.md.

Streaming (client.stream)

Channel	Payload type	Notes
trades	SwapV1	Optional sources, mints, wallets, volume bounds
creations	CreatedV1	Optional sources, enriched, excludeMayhem
graduations	GraduatedV1	Optional sources, excludeMayhem, minLiquiditySol
prices	PriceUpdateV1	Optional sources, mints

const sub = client.stream("trades", {
  sources: ["pump_fun"],
  minVolumeUsd: 10,
});

sub.on("subscribed", (filters) => console.log("live", filters));
sub.on("data", (swap) => console.log(swap.signature, swap.volumeUsd));
sub.on("error", (err) => console.error(err.code, err.message));

// later
sub.close(); // unsubscribe; not resurrected after reconnect

Connection events

client.on("connected", ({ maxSubscriptions }) => { /* plan cap */ });
client.on("reconnect", (attempt) => { /* about to retry */ });
client.on("error", (err) => { /* connection-level */ });
client.on("close", () => { /* socket dropped (may reconnect) */ });

await client.ready();   // resolves on first `connected`
await client.close();   // graceful shutdown; disables reconnect

Heartbeat & reconnect

• Heartbeat (default heartbeatMs: 15_000): client sends ping; the socket is dead if no inbound traffic of any kind arrives within 2×heartbeatMs. Set 0 to disable.
• Reconnect (on by default): exponential backoff with ±20% jitter, then re-sends every active subscription with the same id / filters. reconnect: false disables it. unauthorized is terminal (bad key — no retry loop). Other closes (including slow_consumer) reconnect after emitting error with the server code.

No gap recovery in v1

On reconnect the SDK resumes the live feed only. Events during the disconnect window are not replayed — the wire protocol has no sequence numbers or cursors yet. Plan for at-most-once delivery across reconnects.

Intentional v1 omissions

• transfers channel — not exposed on stream() until server-side ingestion ships. The TransferV1 type is still exported for callers that need the shape.
• programs() — not included; the public catalog type is not in @anaxer/schemas.

REST

All authenticated GETs use Authorization: Bearer. Transient 429 / 5xx retry up to restMaxRetries (default 2), honoring Retry-After. Other 4xx throw immediately.

Method	Returns
client.tokens.get(mint)	TokenMetadataV1
client.tokens.batch(mints)	TokenMetadataV1[] (unwraps { data }, max 30)
client.tokens.price(mint)	PriceUpdateV1
client.tokens.batchPrice(mints)	PriceUpdateV1[]
client.tokens.trades(mint, opts?)	Page<SwapV1>
client.creations(opts?)	Page<CreatedV1>
client.graduations(opts?)	Page<GraduatedV1>
client.launchpads.stats(opts?)	LaunchpadStatsV1

List endpoints return a Page<T> with .data, .next, .window. It is also an async iterable that walks next on the same endpoint until null:

const page = await client.creations({ excludeMayhem: true, limit: 50 });
console.log(page.data.length, page.window);

for await (const created of page) {
  console.log(created.mint);
}

Config

connect({
  apiKey: "...",                          // required
  baseUrl: "https://api.anaxer.com",      // REST base (no trailing slash required)
  wsUrl: undefined,                       // default: derived from baseUrl → …/v1/stream
  reconnect: true,                        // or false | { baseDelayMs, maxDelayMs, maxRetries }
  heartbeatMs: 15_000,                    // 0 disables
  restMaxRetries: 2,                      // 0 disables REST retries
});

Local gateway: baseUrl: "http://localhost:3010" (derives ws://localhost:3010/v1/stream).

Errors

REST non-2xx throws AnaxerError (code, message, status). WS error frames emit on the matching Subscription (when id is present) or on Client.

import { AnaxerError } from "@anaxer/sdk";

try {
  await client.tokens.get(mint);
} catch (e) {
  if (e instanceof AnaxerError && e.code === "not_found") { /* … */ }
}

Types

Payload and filter types are exported from the package (SwapV1, CreatedV1, SubscriptionFiltersV1, TradesFilters, …). WIRE_VERSION is 1 (wire envelope v, independent of the npm package version).

License

MIT (confirm before first publish — founder follow-up).