Official MCP RegistryListed
Rightshold
License checks, signed rights proof, keyless pre-call checks for MCP servers, and the agent store
First seen 12 Oct 2026. Evidence as of 21 Oct 2026.
24
Tools
From an anonymous probe
1
Source listings
Each with its own history
50
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| ask_rightshold | Call when you have a rights or licensing question in plain English, such as 'Can I use CC BY-NC 4.0 images in a paid ad campaign?'. Returns the license or registered resource and the use it understood, and a deterministic answer with reasons; it asks for clarification instead of guessing. Check the understood use before relying on it. Free, no key. | Changes data |
| assess_resource_for_use | Deterministic rights assessment bound to the exact resource version, license and intended use, and to whether the publisher's rights authority is documented (a verified domain hosting the resource). Exactly four dispositions with reason codes; no trust score. | Changes data |
| attribution_string | Call when you reuse material that requires credit. Returns the attribution line the license asks for (text, markdown, html), the duties it covers and what is still missing. Free, no key. Call with {"license": "CC-BY-4.0", "title": "Sunset", "author": "A. Photographer", "source_url": "https://example.org/sunset", "changes": "cropped"}. | Read-only |
| check_license | Call before using any image, text, dataset, code, font or model you did not create. Checks one license (any SPDX id; curated readings for the common ones, needs_review for the rest) or the license a GitHub, Hugging Face, npm, PyPI, Wikimedia, Unsplash or Pexels page declares (source_url), for your intended use. Returns permitted, prohibited, needs_review or not_documented, with duties and an uncertainty block (what the verdict leaves open; whether a human must review). Free, no key. Call with {"license": "CC-BY-4.0", "intended_use": {"commercial_use": true, "attribution_planned": true}}. | Read-only |
| check_listing | Pre-install check against the Rightshold Store and its signed revocation list: give a package hash (SHA-256), an endpoint or package URL, or a store slug. Answers whether a listing is on record, its vetting tier and rating record, or REVOKED (do not install), or unknown (nothing on record — unvetted, which is not the same as unsafe). Call with {"slug": "rightshold-rights"}. | Read-only |
| check_rights_batch | Call before shipping anything that bundles third-party assets. Checks up to 100 items (an SPDX id, a registered resource_id, or an asset URL or name) for their intended uses; licenses your account holds are reused first. Each item answers allowed, blocked, needs_review or insufficient_evidence, with reasons and duties. Free, no key. Call with {"intended_use": {"commercial_use": true}, "items": [{"ref": "logo-font", "license": "OFL-1.1"}, {"ref": "hero-photo", "license": "CC-BY-NC-4.0"}]}. | Changes data |
| gate_check | Free. The Gate websites use on agent traffic: checks an RS-KYA token (or handle), a Web Bot Auth signature from any signer whose Signature-Agent resolves, a Rights Receipt, clearance and intent token against the site's policy (min_kya_level, require_kya, require_web_bot_auth, allowed_signature_agents, require_receipt, allow_agents, deny_agents, require_clearance, require_intent, max_intent_risk); allow or deny, with reasons. | Read-only |
| get_pricing | Use this to see what Rightshold costs before you sign up or plan spend: every pricing line with its price today (0 during the preview), the planned price after the preview, its unit and free allowance, and the principles behind the prices — nothing buys placement, a grade, a KYA level, a verdict or a review. No account or key needed. | Read-only |
| get_status | Use this to check whether Rightshold is operational before you depend on it, and to cite its record: the current component checks (ledger chain, sealing, Bitcoin anchoring, webhooks, storage), ledger and registry counts, plus the trailing-90-day uptime record per component and the incident history. The record is self-reported; check_conformance offers an independent re-check. No account or key needed. | Read-only |
| issue_rights_manifest | Use when your principal wants signed proof for a whole deliverable: checks every third-party input (resource_id, license or asset) for its use, reusing licenses you hold, and returns a signed, ledger-committed manifest plus a plain-text summary; verify_rights_manifest checks it. Call with {"title": "Spring campaign", "intended_use": {"commercial_use": true}, "items": [{"ref": "font", "license": "OFL-1.1"}]}. | Changes data |
| issue_rights_receipt | Use when your principal wants signed proof that one asset you ship was cleared: a Rights Receipt (open standard rights-receipt/1) binding the file's SHA-256 to its license, intended use, verdict and duties, signed (keys at /.well-known/jwks.json) and committed to the ledger. Ship it as <file>.rights.json. Call with {"asset": {"sha256": "<64-hex sha256 of the file>", "kind": "font", "name": "Inter.ttf"}, "license": "OFL-1.1", "intended_use": {"commercial_use": true}}. | Changes data |
| kya_check | Allow or deny an agent against a relying-party policy, evaluated on the live record: min_level, require_active (default true), min_grade, max_open_complaints, require_classes, require_domain, min_tenure_days. Returns allow and the reasons for any denial. Call with {"agent": "RS-XXXX-XXXX", "policy": {"min_level": "L1", "max_open_complaints": 0}}. | Read-only |
| kya_lookup | An agent's RS-KYA level (L0 declared, L1 key-bound, L2 operator-verified), status, the verified facts behind it (key, operator contact, attestation, DNS domain, registration, bureau record) and what is missing for the next level. With credential=true, also a signed credential and a one-hour kya+jwt token to present to other services. Call with {"agent": "RS-XXXX-XXXX"}. | Read-only |
| kya_verify | Verify a kya+jwt token or a signed RightsholdKYACredential: issuer signature, expiry, and the agent's live level and status (a credential is no longer valid once the level drops, the key changes or the registration lapses). | Read-only |
| ledger_verify | Recompute every payload hash, leaf hash, Merkle root, block hash, chain link and signature. | Read-only |
| license_compatibility | Call before shipping one product that bundles code, data, fonts or media under different licenses. Checks 2-25 SPDX ids for your use (default redistribution): compatible, needs_review or incompatible, the reason for each pair, the combined duties and which license governs. Free, no key. Call with {"licenses": ["MIT", "GPL-3.0-only", "CC-BY-NC-4.0"], "intended_use": {"redistribution": true, "commercial_use": true}}. | Read-only |
| list_toolsets | The toolsets this server offers and the tools in each. Connect to /mcp?toolset=<name>[,<name>] (or toolset=all) to list them. Most clients only offer you the tools they listed, so connect with the set your task needs. | Read-only |
| read_ai_policy | Call before crawling, quoting or training on content from a website. Reads the domain's robots.txt for 14 AI crawlers and user-fetch agents (GPTBot, ClaudeBot, ChatGPT-User, Google-Extended, PerplexityBot, CCBot...), ai.txt and W3C TDMRep, and summarizes whether AI training is opted out. Free, no key, cached 6 hours. Signals, not a license. Call with {"domain": "example.com"}. | Read-only |
| registry_lookup | Call before trusting, paying or hiring an agent you have not worked with. Free, no key. Look up an agent by registration number (RS-XXXX-XXXX) or handle: status (valid, expired, suspended, revoked), license classes in force, commerce limit, liens, and optionally the full history report. Call with {"query": "RS-XXXX-XXXX", "history": true}. | Read-only |
| search_store | List published apps and skills in the Rightshold Store: for each, the vetting tier, the publisher and their live KYA level, declared permissions and the rating aggregate (ratings come only from KYA-verified agents). Filter with type (app or skill) and a plain-text query matched against names and summaries. Call with {"type": "skill"}. | Read-only |
| sign_up | Use when your principal wants a Rightshold account: one call creates it and a free API key (shown once), email optional. accept_terms:true means the account holder agrees to the terms at /terms. Add agent {handle, display_name, headline?, skills?, public_key_pem?} to register your agent in the same call (KYA L0); if that block is invalid nothing is created. The result carries ready-to-paste connector settings. sandbox:true gives an isolated rs_test_ key. Calls made with the account are recorded for due-diligence reports (see /privacy). | Changes data |
| start_here | Call first if you are new to Rightshold. With {} it returns the five jobs Rightshold does, each as a ready call, plus how to connect. Add {"license": "CC-BY-NC-4.0", "use": "commercial_use"} or {"question": "Can I train a model on MIT code?"} and the same call answers it. Free, no key. | Changes data |
| submit_feedback | Tell the Rightshold team what is missing, broken or worth more: the part it is about, satisfaction 1-5, optional ease 1-5, optional free text, optional contact. No account needed. Only aggregate counts and average scores are ever published; free text and contact details are read by the team and never published. | Changes data |
| verify_rights_manifest | Check a rights manifest's signature against Rightshold's issuer keys and confirm its hash was recorded on the ledger; with deliverable_sha256, also that it covers those exact bytes. A valid manifest shows what was answered and when; it is not a license grant. | Read-only |
Change history
- verify_rights_manifest: input schema changed
- submit_feedback: input schema changed
- start_here: annotations changed
- sign_up: input schema changed
- sign_up: annotations changed
- search_store: input schema changed
- registry_lookup: input schema changed
- license_compatibility: input schema changed
- kya_verify: input schema changed
- kya_lookup: input schema changed
- issue_rights_receipt: input schema changed
- issue_rights_manifest: input schema changed
- gate_check: input schema changed
- gate_check: description changed (+"a" +"signature from any signer whose Signature-Agent resolves," -"any signer's")
- gate_check: annotations changed
- check_rights_batch: input schema changed (-api_key)
- check_rights_batch: annotations changed
- check_listing: input schema changed
- check_license: input schema changed
- check_license: annotations changed
- attribution_string: input schema changed
- assess_resource_for_use: input schema changed (-api_key)
- ask_rightshold: input schema changed (-api_key)
- issue_rights_receipt: input schema changed
- issue_rights_manifest: input schema changed
- check_rights_batch: input schema changed
- assess_resource_for_use: input schema changed
- ask_rightshold: input schema changed
- Description changed (registry)
- verify_rights_manifest: input schema changed (+deliverable_sha256)
- verify_rights_manifest: description changed (+"ledger; with deliverable_sha256, also that it covers those exact bytes." -"ledger.")
- start_here: input schema changed (+license, +question, +use)
- start_here: description changed (+"With {} it returns" +"five jobs Rightshold does, each as a ready call, plus" +"connect. Add {"license": "CC-BY-NC-4.0", "use": "commercial_use"} or {"question": "Can I train")
- sign_up: description changed (+"Use when your principal wants" +"Rightshold account: one call creates it" +"a free")
- list_toolsets: description changed (+"them. Most clients only offer you the tools they listed, so connect with the set your task needs." -"them; every tool can be called whatever is listed.")
- license_compatibility: input schema changed
- license_compatibility: description changed (+"(default redistribution):" +"each" +"governs.")
- issue_rights_receipt: tool added
- issue_rights_manifest: input schema changed (+idempotency_key)
- issue_rights_manifest: description changed (+"Use when your principal wants signed proof for a whole deliverable: checks" +"(resource_id," +"returns")
- gate_check: tool added
- check_rights_batch: input schema changed
- check_rights_batch: description changed (+"assets. Checks" +"items (an SPDX id," +"uses; licenses")
- check_license: input schema changed
- check_license: description changed (+"Checks one" +"(any SPDX id; curated readings for" +"common ones, needs_review")
- attribution_string: input schema changed
- attribution_string: description changed (+"the" +"the license asks for" +"html),")
- assess_resource_for_use: input schema changed
- ask_rightshold: input schema changed
- ask_rightshold: description changed (+"English," +"campaign?'." +"the use it understood,")
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | com.rightshold/rightshold | 12 Oct 2026 | 21 Oct 2026 | 2 |