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Offendersearch

REMOTE · MCP.OFFENDERSEARCH.APP · SCANNED SEP 26

Search US sex-offender registries and criminal records, with per-source citations.

+3 this week 74 Trust /100
Trust breakdown (7 categories)

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →

Endpoint Security57
Transport & Reachability100
Schema Quality & AI Usability58
  • AI-judged instruction clarity (excellent).Pass
  • Context-footprint check failed: tool/resource definitions use about 2607 tokens (~521/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
  • Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management90
  • Stability observed for 27 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 100% of tool parameters carry a description.Pass
Tool Safety100
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
  • An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
  • Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Install

How do I install the Offendersearch MCP server?

Offendersearch is a hosted endpoint at https://mcp.offendersearch.app/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

remote · mcp.offendersearch.app

# add to Claude Code
claude mcp add --transport http app-offendersearch-offendersearch 'https://mcp.offendersearch.app/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "app-offendersearch-offendersearch": {
      "url": "https://mcp.offendersearch.app/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "app-offendersearch-offendersearch": {
      "type": "http",
      "url": "https://mcp.offendersearch.app/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.app-offendersearch-offendersearch]
url = "https://mcp.offendersearch.app/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "app-offendersearch-offendersearch": {
      "type": "remote",
      "url": "https://mcp.offendersearch.app/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add app-offendersearch-offendersearch --url 'https://mcp.offendersearch.app/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  app-offendersearch-offendersearch:
    url: "https://mcp.offendersearch.app/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "app-offendersearch-offendersearch": {
      "Transport": "http",
      "Url": "https://mcp.offendersearch.app/mcp"
    }
  }
}
# add to Vellum
assistant mcp add app-offendersearch-offendersearch -t streamable-http -u 'https://mcp.offendersearch.app/mcp'
// mcp.json
{
  "mcpServers": {
    "app-offendersearch-offendersearch": {
      "type": "http",
      "url": "https://mcp.offendersearch.app/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.

  • 26 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

  • 25 Sept 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 24 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

  • 22 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

  • 19 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

  • 17 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

  • 15 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

  • 13 Sept 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

Diagnostics

Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.

Captured 26 Sept 2026 · Probed https://mcp.offendersearch.app/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=mcp.offendersearch.app CN=WR3,O=Google Trust Services,C=US 21 Aug 2026 19 Nov 2026 RSA 2048 SHA256-RSA dc0bc56cf43acdb40abc235345fbc57f
SANs: mcp.offendersearch.app
CN=WR3,O=Google Trust Services,C=US (CA) CN=GTS Root R1,O=Google Trust Services LLC,C=US 13 Dec 2023 20 Feb 2029 RSA 2048 SHA256-RSA 7ff005a91568d63abc22861684aa4b5a
CN=GTS Root R1,O=Google Trust Services LLC,C=US (CA) CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE 19 Jun 2020 28 Jan 2028 RSA 4096 SHA256-RSA 77bd0d6cdb36f91aea210fc4f058d30d

Background: What to check on a remote MCP endpoint →

DNSSEC insecure

Validation of mcp.offendersearch.app. — Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
app. present 23684 8 Verified
offendersearch.app. absent Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation
Authentication No authorisation required

The endpoint answered without asking for a token. Anyone who knows the URL can reach it.

Result No authorisation required
HTTP status 200

Background: How OAuth 2.1 works in the 2026 MCP spec →

Transports 2 probes
Transport URL Outcome Status Location
streamable-http https://mcp.offendersearch.app/mcp Verified 200
http (plaintext) http://mcp.offendersearch.app/mcp HTTPS enforced 302 https://mcp.offendersearch.app/mcp
MCP tools · 5 exposed · ~2,424 tokens

The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →

Tool Tokens
batch_search ~376

Run many person/location lookups in one call (row-in / row-out). Each row goes through the SAME engine as search_offenders, so a row's records are identical to what a single search would return. A row that fails is reported with status='error' in place and never aborts the batch. Max 1000 rows. Returns: { count, results: [ { index, status, counts{records,sourcesQueried, sourcesIncomplete}, warnings: [str], records: [Record], error? } ] } in input order. ★ A row with `counts.sourcesIncomplete > 0` could not be searched to the end — its `records` are a LOWER BOUND, not a clean 'no match'. Auth: uses the caller's X-API-Key (request header or OFFENDERSEARCH_API_KEY env).

NameTypeReqDescription
extensiveboolean–Request extensive detail (offenses[], stateData, images) for every row.
freshnessstring–Cache/pricing tier applied to every row: daily=<=24h (default), weekly=<=7d.
jurisdictions––Registry codes applied to EVERY row (e.g. ['FL','TX']). Omit = all 58 registries.
location_scopedboolean–Apply per-state scoping to every row (see search_offenders).
matchstring–Fuzzy tolerance applied to every row (see search_offenders).
queriesarrayyesList of query objects (max 1000). Each may set any of: firstName, lastName, dob (YYYY-MM-DD), age, city, state, zipcode, address, lat, lng, radiusMiles, q. One row in = one result out, in input order.

No output schema declared.

No examples provided.

get_criminal_coverage ~138

List the criminal-record jurisdictions searched, with kind and status. Use it to discover which states and counties are reachable and which are answering today, before relying on an empty result. Depth is uneven by design: counties publish independently, so a state with many county jurisdictions is not "better covered" than one that publishes a single statewide source — it is differently structured. Returns the jurisdiction roster; each entry carries its code, the state it belongs to, the kind of records it holds (jail / prison / court / warrant / registry) and whether it is currently answering.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

get_registry_coverage ~336

List every registry we cover plus its scope, legal status, and health. Public coverage catalog (no API key required). Use it to discover the `jurisdictions` codes accepted by search_offenders / batch_search and to check per-registry freshness/health before relying on a result. Returns: { count, registries: [ SourceInfo ] } where each SourceInfo is: - id: registry code (e.g. 'IL', 'TX', 'PR') - name: human-readable registry name - covers: [state codes] a registry covers ('*' = national / all) - scope: 'state' | 'national' - status: 'live' | 'building' - legal: { commercialUse: 'allowed'|'restricted'|'prohibited'|'unknown' } - health: { lastSuccessAt, typicalLatencyMs, ageSeconds, freshFor } `health` is OPERATIONAL COVERAGE METADATA about our ingest schedule, published for transparency. It is NOT a quality warning about a search result: a search serves every registry's best available data regardless of `freshFor`, so a registry listing only 'weekly' still contributes its records to a freshness='daily' search. Do NOT tell a user their search results are stale, unreliable or out of date on the basis of these fields — they are not. The only completeness signal that belongs in an answer is `counts.sourcesIncomplete` / `warnings[]` from the search response itself.

Input schema present but exposes no named parameters.

No output schema declared.

No examples provided.

search_criminal ~509

Search US criminal records — county jail bookings, state prison custody, court cases and warrants. Covers county jail rosters, statewide prison systems, court sources, warrant systems and statewide registries across the states, DC and the territories, plus the federal layer — which is a separate system holding offences no state search will surface. A surname is REQUIRED. Supply firstName and a DOB or birth year wherever you have them: a bare common surname returns thousands of people, and the scoring cannot tell you which one is yours. Each record carries `recordType`, and YOU MUST READ IT BEFORE CHARACTERISING ANYONE: - a jail booking is an ARREST-stage record — charges at booking are frequently reduced, dismissed, or never filed. It is NOT a conviction. - prison custody implies a sentence, and therefore a conviction. - a court record carries the DISPOSITION — the authoritative statement of how a case actually ended. - a warrant means the person is SOUGHT. Nothing has been tested. Never describe someone as convicted on the strength of a booking record. Records also carry: name, aliases, dob/birthYear/dobPrecision, sex, race, state, county, custody status and facility, sentence and parole detail, `cases`, `sources` (per-source citation), and `matchConfidence`/`matchBasis` explaining why it matched. `counts.records` is the total found and `counts.recordsReturned` the number in this page. Not a consumer report: results must not be used for FCRA-covered decisions (employment, tenancy, credit) without appropriate process.

NameTypeReqDescription
age––Approximate current age, when neither DOB nor birth year is known.
birthYear––Birth year alone, when a full DOB is unknown.
county––County name, to narrow within a state.
dob––Date of birth, YYYY-MM-DD. The single strongest disambiguator.
firstName––Given name. Strongly recommended: a bare common surname returns thousands.
lastNamestringyesREQUIRED surname. The criminal corpus refuses an unbounded query — a name is the field that cannot be enumerated.
limit––Max records to return. Default 50.
state––2-letter state code (e.g. 'TX'). Narrows to that state's jurisdictions.

No output schema declared.

No examples provided.

search_offenders ~1,065

Search US sex-offender registries for one person and/or location. Fans out across all 58 registries (or the ones named in `jurisdictions`), de-duplicates people across registries, scores each match, and returns the normalized records. Supply whatever identifiers you have — all args are optional but at least a name, location, or free-text `q` should be given. Returns a SearchResponse object (docs/openapi.yaml / FIELD-DICTIONARY.md): - status: 'complete' | 'partial' (partial = a source errored, or a source could not be searched to completion) - counts: { records, sourcesQueried, sourcesIncomplete } - warnings: [str] — ALWAYS present, `[]` when the search ran clean - sourceStatus: [ { source, status, matched, fromCache, note, incomplete, incompleteReason } ] per-registry outcome ★ READ `counts.sourcesIncomplete` BEFORE REPORTING A RESULT. Above 0, `records` is a LOWER BOUND: those registries could not be searched to the end, and an empty or short result is NOT evidence that a person is unregistered. Say so. `warnings[0]` states it in plain language; relay it rather than summarising it away. - records: [ Record ], each with: recordId, matchConfidence, matchBasis[], name {first, middle, last, suffix, full}, aliases[], nicknames[], dob, dobPrecision, age, sex, race, ethnicity, height, weight, eyeColor, hairColor, marks, addresses[{type,line1,city,county,state,zipcode,lat,lng}], offense {crime,statute,riskLevel,tier,convictionDate,...}, flags{absconder,predator}, source {jurisdiction,registryName,recordUrl,scrapedAt,sourceUpdatedAt}, sources[], dobVerification, unverified (offenses[], stateData, images[] are populated only when extensive=true) Auth: uses the caller's X-API-Key (request header or OFFENDERSEARCH_API_KEY env).

NameTypeReqDescription
address––Fuzzy street-address filter (every token must appear in some record address).
age––Age filter, used when DOB is unknown. Matched +/-1 year for birthday drift.
city––Residence city filter.
deadline_msinteger–Max time to wait, in ms (default 120000 / 2 min). Lower for a faster bounded response; partial results return status='partial'.
dob––Date of birth 'YYYY-MM-DD'. Improves match precision; drives dobVerification (dob_match / year_match).
extensiveboolean–If true, request extensive detail (retains offenses[], stateData, images). A light call drops them.
first_name––Given name, e.g. 'John'.
freshnessstring–Cache/pricing tier: daily=<=24h (default), weekly=<=7d.
jurisdictions––Registry codes to query (e.g. ['IL','TX']). Omit/null = ALL 58 registries. See get_registry_coverage for codes.
last_name––Surname — the primary match key, e.g. 'Smith'.
lat––Latitude for a GIS radius search (pair with lng).
lng––Longitude for a GIS radius search (pair with lat).
location_scopedboolean–OPT-IN ONLY, and never inferred from `state`. If true AND a state is set, run only the registries covering that state instead of all 58. It is a cost knob that COSTS RECALL: anyone registered by anot…
matchstring–Fuzzy tolerance: strict=exact; balanced=nicknames/variants/initials/typos on first name, exact last; broad=also prefix/typo on last name.
q––Free-text search across name/alias/address/city/state/zip (all tokens must appear).
radius_miles––GIS radius in miles around lat/lng. Defaults to 1 when a point is given; capped at 100.
state––2-letter state/territory code (e.g. 'IL', 'PR'), or the full name. A residence FILTER — it does NOT change which registries run; all 58 are still searched. It filters as a UNION: a record is kept whe…
zipcode––Residence ZIP (first 5 digits used).

No output schema declared.

No examples provided.

Common questions

What is the Offendersearch MCP server?

Offendersearch is an MCP server listed in the public MCP registry as app.offendersearch/offendersearch. Search US sex-offender registries and criminal records, with per-source citations. This page covers its hosted endpoint (https://mcp.offendersearch.app/mcp).

Is the Offendersearch MCP server safe to use?

Offendersearch scores 74 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

What tools does the Offendersearch MCP server expose?

Offendersearch exposes 5 tools: search_offenders, batch_search, get_registry_coverage, search_criminal, get_criminal_coverage. Their descriptions and schemas cost roughly 2,424 tokens of context every time the server is loaded.

Does the Offendersearch MCP server require authentication?

No. We connected to Offendersearch without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the Offendersearch MCP server still maintained?

Offendersearch is still listed as active in the MCP registry. We last reached this channel on 26 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.