# GNU Taler

**Canonical:** https://apis.io/providers/gnu-taler/  
**Website:** https://www.taler.net/  
**APIs profiled:** 2

GNU Taler is an open‑source, privacy‑preserving electronic cash system developed as part of the GNU project. It enables merchants to accept digital payments that are fully auditable for tax purposes while preserving payer anonymity. The system is built on cryptographic protocols and integrates with GNU tools. Taler supports multiple currencies, provides a RESTful API for payment processing, and is maintained by the GNUnet e.V. and Taler Systems SA. The project aims to offer a free, secure, and tax‑compliant alternative to traditional payment methods.

## Kin Score — 27.2 / 100 (thin)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 58.9 |
| Contract Quality | 26.3 |
| Contract Governance | 22.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 50.0 |
| Access Clarity | 0.0 |

Regulatory layer — **Payments**: 24.1 (matched via tags).

## Agent readiness — 16.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | na |
| Operation Distinctiveness | na |

## APIs (2)

- **GNU Taler Core APIs** — Provides public and management REST APIs for Exchange, Merchant Backend, Wallet Core, Core Bank, and other components.
- **GNU Taler API** — GNU Taler API as documented publicly: 176 operations. Contract generated from the documentation by API Evangelist (2026-10-28); not the provider's own document.

## Security (3)

- **Gnu Taler Authentication** — 0 schemes
- **Gnu Taler Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Gnu Taler Vulnerability Disclosure** — security.txt · contact published

## Tags

Payments, E‑Cash, Open Source, Finance, Privacy

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/gnu-taler/). Scores are computed from the provider's own public artifacts under a published rubric.