Signed deterministic checks for supplied JSON invoices, OpenAPI API contracts and JSON events.
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First seen 14 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
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6
Tools
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Tools
| Tool | Description | Behaviour |
|---|---|---|
| check_contract | Paid EUR 0.010 excluding tax per new signed consistency report for a supplied OpenAPI JSON API contract only, with optional supplied offer/observation comparisons. No legal contract analysis, runtime endpoint testing, security audit or full OpenAPI standard certification. Identical request_id and body avoid a second debit. Report reconstruction is available for 30 days; save the original report. After that the request may be refused, never automatically retried with a new ID. | Not declared |
| check_events | Paid EUR 0.002 excluding tax per signed event batch of up to 200 supplied events, no actual delivery attestation. Identical request_id and body avoid a second debit. Report reconstruction lasts 30 days; retain the returned report. No automatic retries. | Not declared |
| effect_guard | Guard one logical external effect. The prepare operation costs 390 micro-EUR excluding tax only when a new logical decision is successfully created; exact prepare replays and get/claim/settle/reconcile/cancel are free. This service grants one opaque execution authority but never performs the external action. Before settle, register the tenant-scoped ES256 outcome verifier described by the hosted OpenAPI. Reuse the same logical_identity and exact body after an unknown transport outcome; changed content conflicts. Keep claim capabilities private and never retry with a new identity merely because a response was lost. | Not declared |
| get_budget_status | Read authenticated prepaid balance and state; free, with no debit. Before funding, the buyer manually purchases a budget at https://xynthera-ai.toasty-seal-8877.chatgpt.site/payg.html. Requires a private budget code in Authorization: Bearer; no OAuth. The initial purchase amount is the hard server-side total spending limit. No automatic recharge. | Not declared |
| reconcile_invoice | Paid EUR 0.005 excluding tax per new, successful signed invoice consistency check. Supply the entire documented JSON input and a stable unique request_id. Analysis of supplied data only, no bank validation. Exact same-body retries avoid a second debit; report reconstruction lasts 30 days, so retain reports. | Not declared |
| spend_truth | Create/read a resource budget and reserve or reconcile an agent action against it. A successful new reserve costs 290 micro-EUR excluding tax; exact reserve replays and create_budget/get_budget/get_reservation/begin/settle/release/mark_unknown/reconcile are free. Reservation is the only billable operation and performs no provider action. Each budget accepts at most 128 reservations; a 129th new logical reservation is rejected before billing. Before settle, register the tenant-scoped ES256 outcome verifier described by the hosted OpenAPI. Reuse logical_identity and the exact body after an unknown outcome; keep capabilities private and use the stable provider idempotency key returned by begin. | Not declared |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | Xynthera AI — JSON invoice, OpenAPI and event checks | - | 14 Oct 2026 |