OpenSettle
Start building
Product

Billing primitives,
built for the way crypto settles.

OpenSettle is the Stripe-shaped API for stablecoins. Same resources, same webhooks, same idempotency — plus the primitives on-chain billing needs: chains, tokens, and wallet authorizations.

Start building See the docs
Settlement in one call
POST /v1/checkouts
{
  "amount": 199.00,
  "currency": "USD",
  "settlement": {
    "chain": "base",
    "token": "USDC",
    "wallet": "0x7a42F4b9Fb8c6E0A93fD1e7c2b19AaE21Bf88D5c"
  },
  "subscription": {
    "price": "price_pro_monthly",
    "autopay": "allowance"
  }
}
How it works

Three steps. No payouts. No reserves.

Because we never hold your funds, there's nothing to settle later. Everything is final when the block confirms.

01

Customer pays to your Router

Any self-custody wallet, any supported chain. One-time, subscription, or allowance-backed.

02

Atomic split on-chain

The Router forwards the net amount to your wallet and our fee to ours — in the same transaction.

03

Webhook, receipt, reconciliation

You get a signed webhook immediately. The customer gets a receipt. Your accountant gets a clean export.

Primitives

Everything you'd build yourself, already built.

Checkouts

Hosted or embedded. One-time, recurring, or multi-currency. Your branding, your domain.

Subscriptions

Three autopay modes for every wallet type your customers actually have.

Customers

Profiles that aggregate every subscription, invoice, and payment to a single entity.

Invoices

Generated automatically or ad-hoc. PDF receipts with tx hashes and chain proofs.

Wallets

Connect any number of settlement addresses per chain. Ours to orchestrate, yours to own.

Webhooks

Signed, idempotent, with exponential retry and full delivery logs.

API keys

Test and live, scoped roles, rotate in one click. CLI for localhost.

Analytics

MRR, GMV, cohorts, churn — the real metrics B2B SaaS actually uses.

Chains

One API. Every stablecoin that matters.

Tron
USDT · TRC20
Avg. fee~$0.30
  • One-time & subscriptions
  • Allowance autopay
USDT·TRC20
Base
USDC · Base
Avg. fee~$0.02
  • One-time & subscriptions
  • Allowance autopay
USDC·Base
Polygon
USDC · Polygon
Avg. fee~$0.01
  • One-time & subscriptions
  • Allowance autopay
USDC·Polygon
Arbitrum
USDC · ARB
Avg. fee~$0.08
  • One-time & subscriptions
  • Allowance autopay
USDC·ARB
Solana
USDC · SOL
Avg. fee~$0.001
  • One-time & subscriptions
  • Allowance autopay
USDC·SOL
Ethereum
USDC · ETH
Avg. fee~$2.40
  • One-time & subscriptions
  • Allowance autopay
USDC·ETH