OpenLookup

OpenLookup

MCP server from Compound Labs. Eleven read-only lookup tools backed by live public data — no API key, no signup, nothing to sign up for.

mcp-name: tech.thecompound/openlookup

OpenLookup was published on npm as compound-mcp until 2026-10-02. That package is deprecated and points here. Install openlookup instead.

Most of these answer questions that a model cannot answer correctly from a training cutoff, because the underlying fact changed after it: what a model costs today, whether a library is still maintained, whether someone has already published the skill you are about to write.

Tools

Things that go stale

Directories

Compliance

lookup_ada_report(domain)

Looks up a US local-government domain in the CivicBinder Municipal Web Accessibility Index — axe-core scans of local-government .gov websites, graded A–F against WCAG 2.1 AA ahead of the ADA Title II deadlines (April 26, 2027 for communities of 50,000+; April 26, 2028 for smaller communities and special districts).

Returns the grade, violation counts (total / serious / critical), the top failing rules, the entity's deadline, and the public report page (https://civicbinder.org/ada/<domain>). The full index is also published as an open dataset at civicbinder.org/ada/dataset.json.

lookup_nonprofit_status(ein)

Checks a nonprofit's EIN against the IRS auto-revocation list and the California Registry of Charities delinquency/suspension lists, via GoodStanding. Returns revocation and reinstatement dates, whether the streamlined 15-month reinstatement window is still open, and whether AB 488 requires charitable fundraising platforms to block the organization's donation pages. A clear: true result means the EIN is on none of the tracked lists.

Install

npm install -g openlookup

Or run without installing: npx -y openlookup

Run

openlookup                # stdio (for MCP clients)openlookup --http 8974    # streamable HTTP on http://localhost:8974/mcp

Claude Code

claude mcp add openlookup -- npx -y openlookup

Claude Desktop

Add to claude_desktop_config.json (Settings → Developer → Edit Config):

{  "mcpServers": {    "openlookup": {      "command": "npx",      "args": ["-y", "openlookup"]    }  }}

Examples

Which model should I use for a coding agent on a budget?

compare_ai_models({ board: "budget/value", limit: 3 }) →

{  "board": "budget/value",  "captured_on": "2026-08-05",  "models": [    {      "rank": 1,      "model": "z-ai/glm-5.2",      "blended_usd_per_mtok": 1.175,      "price_band": "$1 to $5 / M",      "rationale": "3.05T tokens through 6 tracked coding tools · ranked on usage, which measures adoption rather than capability."    }  ]}

Is the city website at 36thdistrictcourtmi.gov ADA compliant?

lookup_ada_report("36thdistrictcourtmi.gov") →

{  "found": true,  "domain": "36thdistrictcourtmi.gov",  "entity_name": "36th District Court",  "grade": "A",  "violations_total": 0,  "ada_title_ii_deadline": "2027-04-26",  "report_url": "https://civicbinder.org/ada/36thdistrictcourtmi.gov"}

Health

Three facts, recorded separately, because a single health endpoint that ANDs them together cannot say which one broke.

npm run health          # the working tree, over stdionpm run health:public   # npx -y openlookup@latest, resolved fresh from npm

--target public is the deployment check, and it is deliberately outside CI. openlookup has no deployed HTTP endpoint, so the public path is npm: it spawns the published tarball through npx, with a throwaway cache and from a neutral directory, so what answers is what a stranger gets rather than this checkout. Build success and externally reachable protocol state are different facts, and this repo has already shipped a version where they disagreed.

Every signal starts failed and is only flipped by evidence from that run. A timeout, a dead socket and a signal that could not be attempted are all failures carrying a reason, never a pass. A finding exits 0 so a scheduled run cannot disarm itself mid outage; --strict exits non zero and is what ops/npm/publish.mjs runs after publishing.

Each run writes a dated receipt to ops/health/receipts/, and ops/health/probe.test.mjs breaks each signal on its own to prove the separation is real.

Scheduled every 6 hours as compound.compound-mcp.health.

Receipts on the compliance tools

lookup_ada_report and lookup_nonprofit_status return the verdict and the lookup as separate fields. clear and grade are the outcome. checked is the receipt: when the lookup ran, which lists or index were consulted, and what that coverage does not include, so an agent can explain what it verified without re-running it.

{  "ein": "475262842",  "clear": true,  "checked": {    "at": "2026-09-20T14:36:34.257Z",    "sources": [      "IRS Automatic Revocation of Exemption List",      "California Attorney General Registry of Charities and Fundraisers"    ],    "via": "https://goodstanding.thecompound.tech/api/lookup",    "scope": "Covers only the two lists named above, as GoodStanding retains them. A clear result means the EIN is absent from those lists. It is not a statement that the organization was never revoked, and no other state registry is consulted."  }}

License

MIT © Compound Labs