Holdyn · B2B Infrastructure

Conditional transaction infrastructure for banks, platforms, and operators.

Create a transaction through the API. Send the payer a scoped access link. Funds settle on the beneficiary's Stripe Connected Account the moment your release condition is met — Holdyn never takes custody and your platform never handles raw card data.

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Webhooks signed HMAC-SHA256Stripe-powered money movementImmutable event logScoped access tokens

Trust infrastructure, not another app to adopt.

Sit behind your customer's existing workflow. Holdyn handles orchestration, evidence, and dispute state — you keep the brand relationship.

01

API-first orchestration

Every action in the dashboard is backed by a documented REST endpoint. The B2B frontend itself is Client #1 — no privileged paths. Your integrators get the exact same surface we use.

02

Scoped access links

Hand a participant a single URL. The token behind it is scoped to one transaction, one role, optionally one use. Expired, revoked, or exhausted tokens are rejected at the edge.

03

Auditable by default

Every state change writes an immutable event. Subscribe a webhook, poll the event log, or both. Signed deliveries, retries, and a query-able case history come standard.

One endpoint

Create a transaction

Destination-charge pattern. Amounts in minor units; the beneficiary's Stripe Connected Account ID is the destination for release.

Read the full reference →
POST /api/v1/b2b/transactions
curl https://api.holdyn.io/api/v1/b2b/transactions \
  -H "Authorization: Bearer htst_…" \
  -H "Content-Type: application/json" \
  -d '{
    "external_reference": "invoice-12345",
    "amount": 50000,
    "currency": "usd",
    "description": "Milestone 1",
    "payer":        { "email": "buyer@example.com", "name": "Buyer Co" },
    "beneficiary":  { "email": "vendor@example.com", "stripe_connected_account_id": "acct_…" },
    "condition_type": "manual_approval",
    "release_method": "manual"
  }'

Ready to sit behind your customer's workflow?

Request an institutional account, generate a test API key, and issue your first scoped access link in minutes.

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