> ## Documentation Index > Fetch the complete documentation index at: https://docs.purps.lol/llms.txt > Use this file to discover all available pages before exploring further. # Prepare a purps.lol launch > Step 1 of a purps.lol launch. Send the launch's terms and get back the exact message your wallet must sign, with the timestamp that is part of it. Nothing is stored or spent. Sign the message with the creator wallet (ed25519 over the UTF-8 bytes, the way `signMessage` does) and send the same terms plus `ts` and `signature` to submit within five minutes. ## OpenAPI ````yaml https://purps.lol/api/v1/openapi.json post /launches/prepare openapi: 3.1.0 info: title: PURPS API version: 1.0.0 description: >- Everything purps.lol can do, as JSON. Read the coin list, a coin's full page and the launchpad; launch coins on purps.lol, pump.fun and Robinhood Chain; wire an existing pump.fun coin's fees into a strategy. No key, no signup. A write is authorised by your own wallet's signature and every transaction is signed in your wallet, never by us. Every response is `{ ok: true, data }` or `{ ok: false, error }`. Cross-origin requests are allowed from any site. servers: - url: https://purps.lol/api/v1 security: [] tags: - name: Coins description: Read what the site shows. - name: Launch on purps.lol description: Launch a coin on purps.lol. Prepare, sign, submit, send, poll. - name: Launch on pump.fun description: Launch straight on pump.fun with fees wired to a strategy. - name: Launch on Robinhood Chain description: Launch through Pons on Robinhood Chain. - name: Redirect a pump.fun coin description: Point an existing pump.fun coin's creator fees at a strategy. - name: Manage a coin description: Attach a strategy to a coin launched without one. Creator-signed. - name: Transactions description: Send a signed Solana transaction through our relay and watch it land. paths: /launches/prepare: post: tags: - Launch on purps.lol summary: Prepare a purps.lol launch description: >- Step 1 of a purps.lol launch. Send the launch's terms and get back the exact message your wallet must sign, with the timestamp that is part of it. Nothing is stored or spent. Sign the message with the creator wallet (ed25519 over the UTF-8 bytes, the way `signMessage` does) and send the same terms plus `ts` and `signature` to submit within five minutes. operationId: prepareLaunch requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/LaunchTerms' responses: '200': description: What to sign. content: application/json: schema: type: object properties: ok: type: boolean enum: - true data: $ref: '#/components/schemas/Prepared' '400': description: Every failure carries the same envelope. content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Every failure carries the same envelope. content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: LaunchTerms: type: object properties: name: type: string description: 1 to 32 characters. required: true symbol: type: string description: 1 to 10 characters. required: true quoteMint: type: string description: The pair, from /pairs `meteora`. required: true feePreset: type: string description: >- Where creator fees go: `airdrop` to holders, `split` half to holders half to you, `creator` all to you (no strategy possible later), `strategy` into a strategy you send now. enum: - airdrop - split - creator - strategy required: true devBuySol: type: number description: >- Your own first buy, in SOL. Converted to the pair on the way in when the pair is not SOL. Default 0. creatorFeeBps: type: integer description: >- Your fee tier, basis points of curve volume, on top of the platform's 1%. Default 100 (1%), maximum 1000. strategy: $ref: '#/components/schemas/Strategy' type: object description: >- Required when `feePreset` is `strategy`. Must be sent identically to submit. creatorWallet: type: string description: The Solana wallet that signs and pays. required: true Prepared: type: object properties: ts: type: integer description: Unix seconds. Send it back unchanged with the signature. message: type: string description: >- The exact text to sign. Sign the UTF-8 bytes as they are: no prefix, no hashing on Solana; `personal_sign` on Robinhood Chain. expiresInSeconds: type: integer description: How long the signature stays valid. 300. hash: type: string description: The terms' hash, as embedded in the message. For your records. Error: type: object properties: ok: type: boolean description: Always false on a failure. error: type: string description: >- A short reason in plain words: `coin not found`, `too many requests`, `invalid wallet signature`. Strategy: type: object description: >- How a coin uses its fees. Basis points sum to 10000 across the three splits. properties: splitBuybackBps: type: integer description: Share of each fee that buys the coin back. required: true splitMarginBps: type: integer description: Share sent to the perp exchange as margin. required: true splitReserveBps: type: integer description: Share kept as a reserve that backs the positions. required: true perpLegs: type: array description: >- The positions to hold: `{ market, direction, leverage, weightBps, reserveMode }`. `market` from /markets, `leverage` a whole number within its cap, weights summing to 10000, `reserveMode` `defensive` or `none` (use the preset's `legReserveMode`). Empty means no perps, in which case margin and reserve must be 0. items: type: object required: true rewardMode: type: string description: >- What profits do: `burn` (default), `holders` pays the coin itself, `backed` pays `payoutMint`. Paying coins need `holderPayoutsEnabled` in /launch-options. enum: - burn - holders - backed payoutMint: type: string description: >- `backed` only: the asset holders are paid in, from /launch-options `payoutAssets` or any Solana mint with a real market. nullable: true payoutMint2: type: string description: >- Optional second payout asset for any paying coin; each buyback splits in half between the two. nullable: true strategy: type: object description: >- The trading rules: `{ preset, tpTriggerPct, tpSlicePct, rungCount, rungMode }`. Take a preset's `config.strategy` from /launch-options, or set your own. nullable: true ````