For Platforms & Developers

Embed Bitcoin payments and clean books into your platform.

Scoped access to Bitcoin activity, accounting data and payment links through OAuth. External partner access is not yet open; talk to us about your integration.

Discuss an integration

yourapp.com/settingsIllustrative
Settings · Bitcoin payments
Connect a Bitcoin wallet
Accept invoices, view balances and activity, without leaving YourApp.
Connect with Flash
1
Your platform
User clicks Connect with Flash. You redirect them with your client_id and the scopes you need.
auth.paywithflash.comIllustrative
Authorize YourApp
YourApp is requesting access to your Flash account.
- Read wallet balances
- Create payments & invoices
- Receive webhooks
Authorize
2
Flash
User authorizes the scopes. Flash redirects back to your callback with an authorization code.
yourapp.com/settingsIllustrative
Settings · Bitcoin payments
Wallet connected
Operations Wallet · 0.412 BTC
Access token usr_abc123…
3
Your platform
You exchange the code for an access token. Make API calls and receive webhooks on the user's behalf.

Use Cases

One integration for payment apps built on Flash.

Create payment links, receive webhooks, and bring treasury context into your product.

Accounting platforms

Labeled Bitcoin activity, cost basis, and export data inside your workflow.

Client ledgers
Reconciliation
QuickBooks data

Mining management tools

Payment links, site revenue, and treasury data inside operator tools.

Site revenue
Operator portals
Hosting invoices

Bitcoin payment tools

Branded payment apps with OAuth2, hosted links, and webhooks.

Payment links
Webhooks
Self-custody

Self-custodial guarantee

Your platform never touches user funds.

OAuth2 in. Webhooks out. Settlement stays with the user.

How to integrate

Four building blocks. One API.

Illustrative exampleIllustrative

// Payment-link request body (illustrative)
{
  "client_id": "example_client",
  "lines": [
    {
      "description": "Hosting, August 2026",
      "quantity": 1,
      "unitPrice": 2500
    }
  ]
}

// Payment webhook event
payment_link.paid

1
OAuth2 authorization
Users connect Flash and approve scopes.
2
Payment links via API
Create hosted payment links from your workflow.
3
Payment webhooks
Receive payment and settlement events.
4
Reconciled treasury data
Labeled balances, cost basis, and exports through the API.