# DADL Registry > Declarative YAML format that describes REST APIs as MCP servers for > Claude, GPT, and any MCP-compatible AI agent. Served at runtime by ToolMesh. > 31 backends, 3987 tools, single-file declarations. ## Specification - [DADL Spec](https://www.dadl.ai/specs): the format itself, RFC-style - [DADL Spec v0.2 (Markdown)](https://www.dadl.ai/spec/dadl-spec-v0.2.md): canonical machine-readable spec - [Canonical JSON Schema v0.2](https://www.dadl.ai/schema/v0.2.json): publish-time validation schema - [Spec version manifest](https://www.dadl.ai/spec/latest.json): latest and supported spec versions - [DADL Spec v0.1 (Markdown)](https://www.dadl.ai/spec/dadl-spec-v0.1.md): frozen previous version - [How to write a DADL](https://www.dadl.ai/howto/write-a-dadl/): step-by-step guide - [Add authentication](https://www.dadl.ai/howto/add-authentication/): credential patterns - [Use composites](https://www.dadl.ai/howto/use-composites/): multi-step tool flows - [Publish to the registry](https://www.dadl.ai/howto/publish-to-registry/): contributing guide - [FAQ](https://www.dadl.ai/faq/): common questions ## Backends (registry) - [Alertmanager](https://www.dadl.ai/d/alertmanager/): 12 tools. Prometheus Alertmanager API v2 -- alerts, silences, receivers, alert groups, status, and operational health - [Algolia HN Search](https://www.dadl.ai/d/algolia-hn-search/): 4 tools, 5 composites. Algolia Hacker News Search API — full-text search, filtering, and retrieval for stories, comments, and users on Hacker News - [Billomat](https://www.dadl.ai/d/billomat/): 145 tools. Billomat REST API — German cloud invoicing & accounting: invoices, estimates, credit notes, recurring invoices, delivery notes, order con... - [BookStack](https://www.dadl.ai/d/bookstack/): 69 tools. BookStack wiki and documentation platform REST API -- shelves, books, chapters, pages (HTML/Markdown content), attachments, image gallery... - [Checkmk](https://www.dadl.ai/d/checkmk/): 146 tools, 3 composites. Checkmk REST API (version 1.0, Checkmk 2.4) -- live host and service status via Livestatus queries, downtimes, acknowledgements and comme... - [Cloudflare](https://www.dadl.ai/d/cloudflare/): 200 tools. Cloudflare API -- DNS, Pages, Workers, KV, R2, D1, Zones, SSL/TLS, Cache, Load Balancers, Firewall/WAF, Page Rules, Access (Zero Trust), ... - [DeepL](https://www.dadl.ai/d/deepl/): 27 tools. DeepL REST API — text translation (with style profiles, translation memory, glossaries and improved tag handling), document translation, ... - [DokuWiki](https://www.dadl.ai/d/dokuwiki/): 30 tools, 3 composites. DokuWiki JSON-RPC API — wiki pages, media files, search, ACL management, and user administration - [ELITEDOMAINS](https://www.dadl.ai/d/elitedomains/): 20 tools. ELITEDOMAINS domain registrar API -- register/transfer/manage .de and gTLD domains, redirector & inline DNS, AuthInfo/AuthInfo2 transfer ... - [GitHub](https://www.dadl.ai/d/github/): 259 tools. GitHub REST API — repositories, issues, pull requests, commits, and code search - [GitLab](https://www.dadl.ai/d/gitlab/): 75 tools. GitLab REST API v4 — projects, issues, merge requests, pipelines, CI/CD, and code search - [Graylog](https://www.dadl.ai/d/graylog/): 216 tools, 6 composites. Graylog REST API -- log search (Views/Search + legacy universal), streams, pipelines, inputs, alerts, events, dashboards, users, roles, s... - [Hacker News](https://www.dadl.ai/d/hackernews/): 10 tools, 3 composites. Hacker News API — read-only access to stories, comments, polls, jobs, users, and live feeds from news.ycombinator.com - [Hetzner Cloud](https://www.dadl.ai/d/hetzner-cloud/): 123 tools. Hetzner Cloud API -- servers, volumes, networks, load balancers, firewalls, floating IPs, primary IPs, images, SSH keys, placement groups... - [Linode](https://www.dadl.ai/d/linode/): 179 tools. Linode (Akamai) cloud infrastructure API -- compute instances, volumes, DNS, networking, Kubernetes, databases, object storage, and accou... - [Mastodon](https://www.dadl.ai/d/mastodon/): 115 tools. Mastodon REST API — statuses, timelines, accounts, notifications, search, media, lists, polls, conversations, trends, filters, and instan... - [Mempool](https://www.dadl.ai/d/mempool/): 88 tools, 5 composites. mempool.space — Bitcoin block explorer, mempool visualizer, fee estimator, Lightning Network explorer, and transaction accelerator - [Mikrotik](https://www.dadl.ai/d/mikrotik/): 297 tools. MikroTik RouterOS REST API -- manage interfaces, IP addresses, routing, firewall, DHCP, DNS, PPP, queues, wireless, system configuration,... - [NetBox](https://www.dadl.ai/d/netbox/): 608 tools. NetBox DCIM/IPAM API -- full v4 coverage: sites, racks, devices, modules, interfaces, cables, power, IPAM (prefixes, IPs, VLANs, VRFs, ro... - [Opnsense](https://www.dadl.ai/d/opnsense/): 343 tools, 4 composites. OPNsense firewall REST API — manage firewall rules, aliases, interfaces, VPN, DHCP, DNS, diagnostics, firmware, and services on OPNsense ... - [PeeringDB](https://www.dadl.ai/d/peeringdb/): 80 tools, 5 composites. PeeringDB v2 API -- the public peering database of networks (ASNs), Internet Exchanges, and colocation facilities: full CRUD over net, ix... - [Shelly Cloud](https://www.dadl.ai/d/shelly-cloud/): 14 tools, 1 composite. Shelly Cloud Control API — monitor and control Shelly IoT devices (switches, covers, lights) via the Shelly Cloud - [Soniox](https://www.dadl.ai/d/soniox/): 25 tools, 4 composites. Soniox Speech AI — async speech-to-text for recorded audio (60+ languages, speaker diarization, language identification, speech translati... - [Stripe](https://www.dadl.ai/d/stripe/): 96 tools. Stripe REST API — payment processing, billing, subscriptions, invoices, products, and financial infrastructure - [Tailscale](https://www.dadl.ai/d/tailscale/): 60 tools. Tailscale API -- devices, users, auth keys, DNS, ACL/policy, webhooks, contacts, posture integrations, log streaming, and tailnet settings - [Umami](https://www.dadl.ai/d/umami/): 89 tools. Umami open-source web analytics — privacy-friendly alternative to Google Analytics - [Victron VRM](https://www.dadl.ai/d/victron-vrm/): 44 tools. Victron Energy VRM API -- monitor and control solar installations, batteries, inverters, and energy systems via the Victron Remote Manage... - [Vikunja](https://www.dadl.ai/d/vikunja/): 29 tools, 5 composites. Vikunja open-source task management — project planning, kanban boards, and task tracking - [Xen Orchestra](https://www.dadl.ai/d/xen-orchestra/): 267 tools. Xen Orchestra REST API (XO 6.4+, current through 6.8) -- complete coverage: VMs (incl. PATCH update + snapshot revert), VM controllers, h... - [Zammad](https://www.dadl.ai/d/zammad/): 206 tools, 3 composites. Zammad helpdesk REST API -- tickets, articles, users, organizations, groups, roles, knowledge base, SLAs, calendars, object manager (cust... - [Zulip](https://www.dadl.ai/d/zulip/): 111 tools, 6 composites. Zulip REST API — messages, channels (streams), topics, users, user groups, subscriptions, reactions, drafts, scheduled messages, saved sn... ## Machine-readable index - [Registry manifest (JSON)](https://www.dadl.ai/registry.json): every backend with tool counts, tags, categories - [Full Markdown corpus](https://www.dadl.ai/llms-full.txt): every backend page concatenated ## Disambiguation DADL = Dunkel API Description Language. Maintained by Dunkel Cloud GmbH and served at runtime by ToolMesh. Not affiliated with DDL (Data Definition Language) in SQL, nor with any other "DADL"/"DAdl" project.