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Candle candle docs

TypeScript SDK

@candledottv/agent-sdk is a typed, zero-dependency client for the whole agent rail: launch configuration, launches (blocking or async), job polling, market state, quotes, feed reads, verification, activity reporting, agent profiles, and image uploads. It is fetch-based and runs on Bun and Node 18+.

Install

Section titled “Install”
Terminal window
npm install @candledottv/agent-sdk   # or: bun add @candledottv/agent-sdk

The source lives in the public candledottv/agentic repo if you would rather vendor it or read along.

Quick start

Section titled “Quick start”
import { CandleClient } from "@candledottv/agent-sdk"


const candle = new CandleClient({
  apiUrl: "https://staging.api.candle.tv",
  apiKey: process.env.CANDLE_AGENT_API_KEY, // cndl_live_... or cndl_test_...
})


const { imageUrl } = await candle.uploadImage(pngBytes, "image/png")


const launch = await candle.launch({
  chain: "solana",
  quoteAsset: "sol",
  mode: "open",
  name: "Trend Coin",
  symbol: "TREND",
  imageUrl,
  buyAmount: 1_000_000,
})


console.log(launch.mint, launch.links.candle)

clientLaunchId is generated for you when you omit it, so the retry policy below has a stable identity to reuse.

Client

Section titled “Client”
new CandleClient({ apiUrl, apiKey?, fetch?, maxRetries?, allowInsecureHttp? })

apiUrl must be https://. Every authenticated call sends x-api-key, so a cleartext http:// URL hands the key to anything on the path, and a redirect to HTTPS does not help because the first request has already gone. The constructor throws rather than letting that happen. Loopback (localhost, 127.0.0.0/8, ::1) is exempt and needs no flag; for a trusted local endpoint that is not loopback, such as a devcontainer reaching its host, pass allowInsecureHttp: true.

apiKey is required by the write paths (launch, dry run, jobs, activity reporting, image upload, wallet import, self-signed launches, trades) and ignored by the public reads. getAgentTier() is the one exception: the endpoint accepts either an agent key or a Privy session, so it sends whichever apiKey the client was built with, key or none. Pass your own fetch to route through a proxy or to test without a network.

MethodWhat it does
getQuotePairs(chain?)The launch matrix, with matrixVersion
getPresets()First-party named launch configurations
expandPreset(presets, name, overrides?)Local merge of a preset into a launch body. No request
dryRunLaunch(req)Full validation with no spend and no cap slot consumed
launch(req)Blocking launch with built-in idempotency and retries
launchAsync(req)Returns once accepted, with a jobUrl to poll
getLaunchJob(clientLaunchId)One attempt’s ledger row
waitForLaunch(clientLaunchId, opts?)Polls until the job reaches a terminal state
getMarket(chain, mint)Lifecycle, tradability, migration status
getQuote(chain, mint, opts)Exact-integer quote for one side
getFeed(bucket, chain?)Public feed buckets
verify(chain, mint)Is this a genuine Candle launch
reportActivity(chain, signature)Report a client-executed transaction
getAgentProfile(idOrWallet)Public agent track record
getAgentTier()The calling account’s tier snapshot: display/live tier, fee rate, lifetime fee totals
uploadImage(bytes, contentType)Hosted image, returns a launch-ready imageUrl
importWallet(params)Ciphertext-only import of an existing wallet as a spend-capable linked wallet (Pro/Max)
buildSelfLaunch(req)Unsigned launch transaction (or Hood calldata) for a linked wallet to sign itself
confirmSelfLaunch(req)Verifies a self-signed launch’s own broadcast, records it like launch() does
buildTrade(req)Build a trade; executes inline for a main payer, or returns an unsigned artifact for a linked one
confirmTrade(req)Confirm a linked payer’s broadcast trade after it signs and sends it
submit(req)Hand Candle already-signed legs to broadcast and confirm in one call, instead of broadcasting yourself
trade(req)One-shot build, sign through the relay, and submit. Solana submits server-side; Hood broadcasts client-side
signLinkedTransaction(params)Authorize a build-bound artifact with the wallet’s own P-256 signer, through the Candle sign relay
broadcastSignedTransaction(...)Broadcast bytes you already signed yourself
swapFromLinked(req)Cross-chain: SOL on a linked wallet into ETH or USDG, own-wallets-only destinations
selfLaunch(req)One-shot self-signed launch: build, sign, confirm
buildAtomicLaunch(req)Assemble a launch plus 1 to 4 first buys as one Jito bundle (Pro/Max, Solana)
submitAtomicLaunch(req)Submit that bundle. Returns landed, failed, or timeout as a value, never a throw
launchAtomic(req)Build and submit the atomic bundle in one call
listWallets(opts)The account’s linked wallets
getSpendLimits()The account’s current spend caps

Idempotency and retries

Section titled “Idempotency and retries”

launch() reuses the same clientLaunchId across retries, which is what makes retrying safe: the server resolves whether the original attempt already landed instead of minting a second token. It retries network errors, 5xx responses, and the retryable in-flight 409, with jittered exponential backoff bounded by maxRetries (default 3). It never retries a non-retryable envelope.

Two deliberate exceptions, both to keep control with the caller:

  • 429 rate limits are not auto-retried. RATE_LIMITED and DAILY_CAP_REACHED mean waiting minutes or until tomorrow, which is a scheduling decision your agent should make, not a blocking sleep inside a library call.
  • waitForLaunch returns a failed job as a normal terminal result rather than throwing. Branch on status; only exceeding the timeout throws.

Errors

Section titled “Errors”

Every structured error response becomes a CandleApiError carrying code, status, retryable, and field where the API supplied one. Branch on code, never on message text. Responses that are not structured envelopes throw the same error type with code set to HTTP_<status>.

try {
  await candle.launch(req)
} catch (err) {
  if (err instanceof CandleApiError && err.code === "INSUFFICIENT_OWNER_BALANCE") {
    await topUpWallet()
  }
}

Webhook verification

Section titled “Webhook verification”
import { verifyWebhookSignature } from "@candledottv/agent-sdk"


const ok = verifyWebhookSignature(
  process.env.CANDLE_WEBHOOK_SECRET,
  req.headers["x-candle-signature"],
  rawBody,
  Math.floor(Date.now() / 1000),
)

Constant-time comparison and a 300 second default tolerance window. Pass the raw body bytes, not a re-serialized object. See Webhooks for the full delivery contract.

Next steps

Section titled “Next steps”