Build before you buy

Your first useful check, without a card.

Try a local invoice, contract or event check without a card. When your workflow needs automated signed reports, choose a prepaid budget from €10 to €10,000. No subscription or automatic renewal.

Three steps to integrate

1. Run a free local check on synthetic or redacted structured data.
2. Read the prepaid request example and per-operation prices. Only the three checks listed in that guide are currently available with this budget.
3. Save your private recovery code, confirm payment, then use it as a protected Bearer credential from your server. Save every report and its signature yourself.

Prepaid integration kit

Download Python, JavaScript, curl, Postman and disabled n8n HTTP examples · OpenAPI: three paid operations · Complete integration guide. No external SDK dependencies, checkout automation or recharge. The n8n templates are structurally checked; live n8n execution remains unqualified.

Existing assurance and subscription downloads

These SDK, CLI, Postman and OpenAPI downloads describe their existing assurance or subscription interfaces. They do not automatically support the new prepaid Bearer code. For a new budget, use the prepaid HTTP guide.

Workbench: Contract Check and Event Check APIs · Swiss protocol client. Workbench is documented for REST/Postman; the existing SDK beta.4 archive retains its existing assurance interface.

• OpenAPI contract — 34 paths / 35 operations
• Postman collection — import into your own workspace
• TypeScript SDK
• Command line client
• SDK / CLI checksums

First public request

curl --fail --silent --show-error https://pfxxzsnboehxsefyajml.supabase.co/functions/v1/xynthera-ai-assurance/v1/coverage

This reports evidence levels and gaps. It grants no authorization. Keep paid API keys on your server and verify the signed result, not just HTTP 200.

Existing verifier integrations — assess separately

The prepaid budget currently covers invoice, contract and event checks. Watch, Gate and other assurance operations are not automatically included; discuss their actual availability before integrating.

Use Xynthera around your current stack: trust-source changes → affected deployments → signed Gate → retained evidence. A deployment record does not attest the running code, and EUDI source coverage must be assessed separately from where you can buy.

Check all configured billing countries · Read prepaid pricing, signing and access

Current prepaid availability and existing-interface catalogue

Invoice Reconciliation — free checker and signed API

Agent Action controls and owner-key setup · Connect a compatible MCP client