Changelog

Every change to the API, newest first.

v1 only gains fields. Anything that would break a client ships as v2, announced here 90 days ahead. The server release is in each entry; GET /api/version and the spec's info.version show the one that is live.

A full documentation site

The developer docs are now a full site, and the OpenAPI spec describes every endpoint.

• Guides, principles, this changelog and an FAQ at /developers, with search.
• An API reference page for every endpoint: parameters, request bodies, response codes, examples in cURL, JavaScript and Python, and a console to try read endpoints with your key.
• llms.txt, llms-full.txt and every page as Markdown: add .md to its address.
• OpenAPI: tags, operation ids, descriptions and response examples on every operation, plus the key and fee recipient endpoints (/keys, /keys/self, /keys/{id}, /fees/{mint}, /fees/batch) that were missing from the spec.

Cash Payback DEX share is 70%

• The Cash Payback split while a reimbursement fills is now 10% burn, 5% treasury, 70% DEX and 15% holders (was 65% and 20%). GET /payback and every coin's split carry the new numbers; holders still get 85% once the reimbursement is paid.

Launches that land late

• 504 unconfirmed: a launch that was sent but is not confirmed yet. Submit the same launch again or read GET /launches/{id}; never create it again.

• GET /launches/{id} stays submitting while a sent launch is unconfirmed and carries its signature, and turns expired once the chain rules it out.

Wallet shares run to the present

• /payback/wallets/{owner} adds each bag's time since the last holder count, so the share estimate, hold time and multiplier are current.

The registry, open read keys and faster answers

Tell Payday coins apart from every other pump.fun coin, at volume.

• GET /registry, GET /registry/{mint} and POST /coins/check (500 mints in one request). See Which coins are Payday's.
• Read keys without a sign-in: 3 a day per address, sharing 1,200 requests a minute, switched off after 90 days unused.
• DELETE /keys/self: whoever holds a key can switch it off.
• ETag on every read answer; If-None-Match gives an empty 304.

• The fee recipient endpoints use the same keys, limits and error shape as the rest of the API, and answer non-Payday mints from memory. POST /fees/batch costs one request plus one per Payday coin.
• /coins?sort= accepts only new, market_cap, volume and holders.

Baskets of up to 15 assets

• Basket launches take up to 15 assets (was 10). A launch with too many is refused with basket_size instead of being trimmed.

Fees being collected on basket coins

• fund.being_collected_usd on basket coins: the holders' share of fees still being collected on pump.fun.

Baskets of up to 10 assets

• Basket launches take up to 10 assets (was 5); GET /payback reports max_assets.

Baskets on production

• Basket fields on coins (cash_payback.basket), /coins?basket=, GET /rewards, GET /rewards/assets and the basket launch field are live.

Cash Payback baskets

• Payout and Fund baskets: basket on POST /launches, basket details on /payback/coins/{mint} (basket, holdings, fund, dividends), and the reward list.

No launcher share on Cash Payback

• dev_share_pct on POST /launches. The launcher is only reimbursed for DEX.

Cash Payback endpoints

• GET /payback, /payback/coins/{mint}, /payback/coins/{mint}/rounds/{n} and /payback/wallets/{owner}.
• mode on every coin (account or cash_payback), and mode: "cash_payback" on POST /launches.

EVM coins and launches

• Elysium coins in /coins and /coins/{mint}, with chain and chain_id, and a chain filter.
• Keyed EVM launches: /evm/chains, /evm/configs, /evm/quote, /evm/launches, submit and status.

Keys work right away

• A key made after an X sign-in works as soon as it is made, launch keys included. No approval step; key_pending no longer happens for new keys.

Default descriptions

• A launch without a description says who the coin pays, for example Fees to @example via XMONEY using PAYDAY.

Zelle as a fee destination

• fees_to: "zelle:<email or 10-digit US phone>" where Zelle is on. The email or number never appears in any response.

The launch API

• POST /launches, POST /launches/{id}/submit, GET /launches/{id} and the fee split endpoints, for keys made with launching switched on.

Keys on every call

• Every data call needs a key in a header; keys in URLs are refused. 600 a minute and 250,000 a day per key.

API v1

• /api/v1: coins, accounts, payouts, burns, stats and the OpenAPI spec.

Fee recipient API

• GET /fees/{mint} and POST /fees/batch for trading terminals: who receives a token's creator fees, with the on-chain facts to verify it.