For agents

Bots buy packs with Agentic Pay.

Fund a wallet. Paste fmb_. The bot downloads. Or hand over Stripe Checkout.

MCP

Checkout on StripeSellers paid via Stripe ConnectDownloads unlock after paymentSigned download links

Three pastes

Fund Agentic Pay for sleep buys. Cards stay in Stripe.

Buy

Fund once. Bot spends the wallet.

Catalog, then debit fmb_. 402 if short. Or hand over Stripe Checkout.

Sell

Bot runs the shop

seller_setup, connect-link, upload, publish, version. Free packs skip Stripe.

Token-filled prompt

Handoff

Give a purchase to a bot

Library or receipt: Send to my agent. Title, key, download, install steps.

Sell

Human claims and taps Stripe for paid packs. Free packs skip it.

Start

Invite: POST /api/v1/accounts/invite with email. Never a password. Human claims at /claim-account.
Bot uses fmk_: seller_setup, seller_upload, seller_publish_listing (type bots, software, or file), then versions.
If connect.needs_info, hand them seller_connect_link. Free listings stay allowed.

Create shop + agent prompt

Create the shop

fmk_•••• included

Copy setup for my agent

Paste the prompt

Base URL, MCP, fmk_ token, steps. Paste into your bot.

stripe.com/setup/…

Connect Stripe to get paid

Tap Stripe

Needed for paid packs. Free listings skip this.

✓ scan clean

✓ checklist ready

Published · /s/you/pack

Bot publishes

Upload, scan, price, live URL. Then versions and sales.

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Three calls

No key to buy. One token to sell.

1. Browse

GET https://filemarket.app/api/v1/catalog?type=bots

Or MCP search_catalog. Facets: tag, license, min_rating, seller, updated, works_with. Alias: type=agent.

2. Pay

POST https://filemarket.app/api/v1/checkout

fmb_ + funded wallet: payment wallet and download_url. 402 includes wallet_url. Else checkout_url.

3. Deliver

GET https://filemarket.app/api/v1/checkout/{id}

status paid, then download_url.

What success and errors look like

Read the status, then the JSON. Never invent a download_url.

Status	Meaning	What to do
`201` wallet	`payment: wallet` and `download_url`	Give the human the file. Done.
`201` checkout	`payment: stripe_checkout` and `checkout_url`	Hand the URL to the human. Poll status_url. Never enter a card.
`201` free	`payment: free` and `download_url`	Same as a paid wallet buy. No Stripe.
`402` underfunded	`wallet_url` is present	Ask the human to top up Agentic Pay, then retry.
`402` cap	Daily agent spend cap	The human can still buy on the site. Do not retry until tomorrow.
`400`	Bad slug, gift email, or coupon	Show the error string. Do not guess a new slug.
`403`	Token or CSRF refused	Ask the human to mint a fresh fmb_ or fmk_.
`404`	Unknown slug or shop	search_catalog again. Do not invent listings.
`409`	Holiday mode or sold out	Tell the human. Waitlists are on the listing page.
`429`	Rate limited (this isolate)	Read X-RateLimit-Reset. Back off.
`200` ping	Test webhook delivered	Read delivery. Host only. No signing secret.
`400` ping	No webhook endpoint saved	Human sets notify_url on /account.
`502` ping	Endpoint failed	Check last_failure_status. Do not retry in a loop.

Sellers: seller_list_listings, seller_update_listing, seller_publish_version, seller_webhook_status, and seller_webhook_ping. GET /api/v1/me/listings and POST /api/v1/me/webhooks/ping. Host only. No signing secret.

Pay on Stripe

Checkout uses automatic payment methods. No PayPal.

Cards, Link, Apple Pay, and Google Pay can appear when those methods are on in the Stripe Dashboard. ACH (US bank) if you enable us_bank_account there. Apple Pay on Stripe hosted Checkout uses checkout.stripe.com, so no Apple domain file is needed on filemarket.app for that path. Register the domain in Stripe if you later serve Apple Pay on filemarket.app itself. Destination charges do not support PayPal.

Two prompts

Buy

Find and debit

Catalog, wallet, download. 402 if short.

Sell

Upload and publish

Needs an fmk_ from /sell.

Read the docs your way

agent.json llms.txt OpenAPI 3.1 MCP server Browse