Genesis - Create Launch | REST API

Build the on-chain transactions for a new Genesis token launch. Returns unsigned transactions that must be signed and sent before calling Register Launch.

Use the SDK instead

Most integrators should use createAndRegisterLaunch from the SDK, which handles creating transactions, signing, sending, and registering the launch in a single call. This endpoint is only needed if you require direct HTTP access without the SDK.

We recommend using the Create API to build launches programmatically, as metaplex.com does not yet support the full feature set of the Genesis program. Mainnet launches created through the API will appear on metaplex.com once registered.

Endpoint

POST /v1/launches/create

Request Body

Field	Type	Required	Description
`wallet`	`string`	Yes	Creator's wallet public key
`launch`	`object`	Yes	Full launch configuration (see below)

Launch Configuration

The launch object describes the full token and launch setup:

Field	Type	Required	Description
`name`	`string`	Yes	Token name, 1–32 characters
`symbol`	`string`	Yes	Token symbol, 1–10 characters
`image`	`string`	Yes	Token image URL (Irys gateway)
`description`	`string`	No	Token description, max 250 characters
`decimals`	`number`	No	Token decimals (defaults to 6)
`supply`	`number`	No	Total token supply (defaults to 1,000,000,000)
`network`	`string`	No	`'solana-mainnet'` (default) or `'solana-devnet'`
`quoteMint`	`string`	No	Quote token mint address (defaults to wrapped SOL)
`type`	`string`	Yes	`'project'` or `'memecoin'`
`finalize`	`boolean`	No	Whether to finalize the launch (defaults to `true`)
`allocations`	`array`	Conditional	Array of allocation configurations (required for `project`, ignored for `memecoin`)
`externalLinks`	`object`	No	Website, Twitter, Telegram links
`publicKey`	`string`	Yes	Creator's wallet public key (must match the top-level `wallet` field)

Allocation Types

Each allocation in the allocations array has a type field:

launchpoolV2 — Proportional distribution pool
raydiumV2 — Raydium LP allocation
unlockedV2 — Unlocked tokens to a recipient
lockedV2 — Locked tokens via Streamflow
presaleV2 — Fixed-price presale

The SDK's buildCreateLaunchPayload function handles converting the simplified CreateLaunchInput into this full payload format. See the API Client docs.

Memecoin Type

When type is 'memecoin', the API uses hardcoded allocations and parameters. You do not need to provide an allocations array — the API builds it automatically with fixed splits (50% launchpool, 49% Raydium LP at 98%, 1% creator unlocked). The deposit window is 1 hour, LP is permanently locked, and the minimum raise is 50 SOL or 5,000 USDC.

Example Request — Project Type

curl -X POST https://api.metaplex.com/v1/launches/create \
  -H "Content-Type: application/json" \
  -d '{
    "wallet": "YourWalletPublicKey...",
    "launch": {
      "name": "My Token",
      "symbol": "MTK",
      "image": "https://gateway.irys.xyz/...",
      "decimals": 6,
      "supply": 1000000000,
      "network": "solana-devnet",
      "quoteMint": "So11111111111111111111111111111111111111112",
      "type": "project",
      "finalize": true,
      "publicKey": "YourWalletPublicKey...",
      "allocations": [...]
    }
  }'

Example Request — Memecoin Type

curl -X POST https://api.metaplex.com/v1/launches/create \
  -H "Content-Type: application/json" \
  -d '{
    "wallet": "YourWalletPublicKey...",
    "launch": {
      "name": "My Memecoin",
      "symbol": "MEME",
      "image": "https://gateway.irys.xyz/...",
      "decimals": 6,
      "supply": 1000000000,
      "network": "solana-devnet",
      "quoteMint": "So11111111111111111111111111111111111111112",
      "type": "memecoin",
      "finalize": true,
      "publicKey": "YourWalletPublicKey..."
    }
  }'

Success Response

{
  "success": true,
  "transactions": [
    "base64-encoded-transaction-1...",
    "base64-encoded-transaction-2..."
  ],
  "blockhash": {
    "blockhash": "...",
    "lastValidBlockHeight": 123456789
  },
  "mintAddress": "MintPublicKey...",
  "genesisAccount": "GenesisAccountPDA..."
}

Field	Type	Description
`success`	`boolean`	`true` on success
`transactions`	`string[]`	Base64-encoded serialized transactions
`blockhash`	`object`	Blockhash for transaction confirmation
`mintAddress`	`string`	The token mint public key
`genesisAccount`	`string`	The genesis account PDA public key

Error Response

{
  "success": false,
  "error": "Validation failed",
  "details": [...]
}

Field	Type	Description
`success`	`boolean`	`false` on error
`error`	`string`	Error message
`details`	`array?`	Validation error details (when applicable)

Error Codes

Code	Description
`400`	Invalid input or validation failure
`500`	Internal server error

Recommended: Use the SDK

Instead of calling this endpoint directly, use createAndRegisterLaunch which handles the entire flow — creating transactions, signing, sending, and registering — in one call:

createAndRegisterLaunch.ts
1import {
2  createAndRegisterLaunch,
3  CreateLaunchInput,
4  genesis,
5} from '@metaplex-foundation/genesis'
6import { createUmi } from '@metaplex-foundation/umi-bundle-defaults'
7import { keypairIdentity } from '@metaplex-foundation/umi'
8
9const umi = createUmi('https://api.mainnet-beta.solana.com')
10  .use(genesis())
11
12// Use keypairIdentity to set a wallet when running server-side:
13// umi.use(keypairIdentity(myKeypair))
14
15const input: CreateLaunchInput = {
16  wallet: umi.identity.publicKey,
17  token: {
18    name: 'My Token',
19    symbol: 'MTK',
20    image: 'https://gateway.irys.xyz/...',
21  },
22  launchType: 'project',
23  launch: {
24    launchpool: {
25      tokenAllocation: 500_000_000,
26      depositStartTime: new Date(Date.now() + 48 * 60 * 60 * 1000),
27      raiseGoal: 250,
28      raydiumLiquidityBps: 5000,
29      fundsRecipient: umi.identity.publicKey,
30    },
31  },
32}
33
34const result = await createAndRegisterLaunch(umi, {}, input)
35console.log(`Launch live at: ${result.launch.link}`)

See API Client for the full SDK documentation including all three integration modes.