> ## 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. # Build a pump.fun launch > One call, no message to sign. Builds the pump.fun create transaction with the coin's creator fees already pointed at the coin's PURPS wallet; the create transaction is the proof. Sign with the creator wallet and the mint key, send through /transactions/send, then call /pumpfun/fees to lock the fee routing and /redirects to attach the strategy. The creator wallet needs about 0.04 SOL plus the dev buy (0.045 with a custom pair) or the build is refused with a 400; a wallet the launchpad does not admit gets a 403. `imageUrl` fetches are budgeted (20 an hour per address, 200 an hour site-wide); a 429 naming image fetches means send `image` as a data URL instead. ## OpenAPI ````yaml /openapi.json post /pumpfun/launches openapi: 3.1.0 info: title: PURPS API version: 2.0.0 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 Pons; wire an existing pump.fun coin's fees into a strategy; steer a coin you own. No key, no signup. A launch is one call that returns unsigned transactions: the launch transaction can only land with your wallet's signature, and that is the proof. The few writes that need a message signature (Pons launches, wiring a strategy onto a coin, creator authority) come as a prepare/submit pair. 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. Every answer from the API itself carries `RateLimit-Limit` and `RateLimit-Policy`; uncached ones (writes, prepare and submit, refusals) carry `RateLimit-Remaining` and `RateLimit-Reset` as well. The 503 while the API is paused and the 410 on old v1 write addresses carry neither. servers: - url: https://purps.lol/api/v2 security: [] tags: - name: Coins description: Read what the site shows. - name: Launch on purps.lol description: Launch a coin on purps.lol. Build, sign, send, poll. - name: Launch on pump.fun description: Launch straight on pump.fun with fees wired to a strategy. - name: Launch on Pons description: Launch through Pons, the launchpad 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: Creator authority description: >- Steer a purps.lol coin you own: act on a position, change its strategy, ask for authority, or hand the coin on. Every move is signed by the owner's wallet and published on the coin's Changes tab. - name: Transactions description: Send a signed Solana transaction through our relay and watch it land. paths: /pumpfun/launches: post: tags: - Launch on pump.fun summary: Build a pump.fun launch description: >- One call, no message to sign. Builds the pump.fun create transaction with the coin's creator fees already pointed at the coin's PURPS wallet; the create transaction is the proof. Sign with the creator wallet and the mint key, send through /transactions/send, then call /pumpfun/fees to lock the fee routing and /redirects to attach the strategy. The creator wallet needs about 0.04 SOL plus the dev buy (0.045 with a custom pair) or the build is refused with a 400; a wallet the launchpad does not admit gets a 403. `imageUrl` fetches are budgeted (20 an hour per address, 200 an hour site-wide); a 429 naming image fetches means send `image` as a data URL instead. operationId: buildPumpLaunch requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/PumpLaunchBuild' responses: '200': description: The transactions to sign. content: application/json: schema: type: object properties: ok: type: boolean enum: - true data: $ref: '#/components/schemas/SolanaBuild' '400': description: Every failure carries the same envelope. content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: Every failure carries the same envelope. content: application/json: schema: $ref: '#/components/schemas/Error' '413': 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' '503': description: Every failure carries the same envelope. content: application/json: schema: $ref: '#/components/schemas/Error' components: schemas: PumpLaunchBuild: type: object description: >- A pump.fun launch, in one call. No `ts` or `signature`: the create transaction you sign is the proof. 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: >- A pair from /pairs `pumpfun`. Omit for SOL. A custom pair needs `customPairAccess` in /launch-options. devBuySol: type: number description: Your own first buy, in SOL. Default 0. creatorWallet: type: string description: The Solana wallet that signs the transactions and pays. required: true image: type: string description: >- The coin's logo as a data URL (`data:image/png;base64,…`). PNG, JPEG, WebP or GIF, 512KB max. Send this or `imageUrl`. imageUrl: type: string description: >- A public https link to the logo instead of `image`. Fetched by us under the same size and type rules. description: type: string description: >- Up to 500 characters. The coin's website in its metadata is always its purps.lol page; add your own links as `twitter` and `telegram`. twitter: type: string description: https:// link. telegram: type: string description: https:// link. SolanaBuild: type: object properties: mint: type: string description: The new coin's mint address. transactions: type: array description: Base64 transactions to sign and send in order. items: type: string createIndex: type: integer description: >- Which of `transactions` is the create. Sign that one with the mint key as well. mintSecret: type: string description: >- The mint keypair's secret, base58. Powerless after the launch; use it once to countersign the create. nullable: true imageUrl: type: string description: Where the logo was stored, when this build uploaded one. nullable: true url: type: string description: The coin's future page. 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`. ````