Your agent can call this
and get the citation back.

Every endpoint takes Authorization: Bearer <key>. An unrecognised key is rejected with a structured 401 rather than silently downgraded to the sandbox tier — a caller with a stale key must be told, not quietly served under different limits.

# Base URL
https://www.job13.com/api/v1

# Every request
-H 'authorization: Bearer lb_test_sandbox'

CORS is open for GET and POST from any origin, so browser-side agents can call it directly.

Every command below is complete and runnable as written. Responses are trimmed for readability but the field names are exact; each one also carries rule_edition and disclaimer.

curl -s https://www.job13.com/api/v1/recordability \
  -H 'authorization: Bearer lb_test_sandbox' \
  -H 'content-type: application/json' \
  -d '{
    "occurredInWorkEnvironment": "yes",
    "isNewCase": "yes",
    "treatments": ["sutures_staples_or_surgical_glue"]
  }'

{
  "verdict": "recordable",
  "summary": "Recordable — the case meets the 1904.7(a) criterion: Medical treatment beyond first aid.",
  "criteriaMet": ["Medical treatment beyond first aid"],
  "steps": [
    {
      "key": "general_criteria",
      "question": "Does the case meet one or more of the general recording criteria in 1904.7(a)?",
      "answer": "Yes — Medical treatment beyond first aid.",
      "decisive": true,
      "citations": [
        {
          "section": "1904.7",
          "paragraph": "1904.7(b)(5)",
          "quote": "Not on the exhaustive first-aid list; only butterfly bandages and Steri-Strips are first aid — 1904.7(b)(5)(ii)(D).",
          "url": "https://www.ecfr.gov/current/title-29/part-1904/section-1904.7"
        }
      ]
    }
  ],
  "unresolved": [],
  "caveats": [],
  "rule_edition": "2026-01-01",
  "disclaimer": "Job13 is an administrative classification aid, not legal advice. ..."
}

curl -s https://www.job13.com/api/v1/rates \
  -H 'authorization: Bearer lb_test_sandbox' \
  -H 'content-type: application/json' \
  -d '{
    "hoursWorked": 400000,
    "totalRecordableCases": 6,
    "casesWithDaysAway": 2,
    "casesWithRestrictionOrTransfer": 1
  }'

{
  "trir": 3,
  "dart": 1.5,
  "dafw": 1,
  "basis_hours": 200000,
  "note": "Rates are per 200,000 hours worked ...",
  "formulas": { "trir": "(total recordable cases x 200000) / hours worked", "...": "..." }
}

// With hoursWorked: 0 —
{
  "trir": null,
  "dart": null,
  "dafw": null,
  "note": "hoursWorked is zero or missing, so no rate can be computed. These fields are null rather than 0 on purpose: 0 would read as a perfect safety record when the truth is that there is no data."
}

curl -s https://www.job13.com/api/v1/rule/1904.7 -H 'authorization: Bearer lb_test_sandbox'

{
  "section": "1904.7",
  "title": "General recording criteria",
  "heading": "§ 1904.7 General recording criteria.",
  "paragraphs": ["(a) Basic requirement. You must consider an injury or illness to meet the general recording criteria, and therefore to be recordable, if it results in any of the following: death, days away from work, ..."],
  "url": "https://www.ecfr.gov/current/title-29/part-1904/section-1904.7",
  "verbatim": true
}

curl -s https://www.job13.com/api/v1/first-aid-list -H 'authorization: Bearer lb_test_sandbox'

{
  "count": 14,
  "exhaustive": true,
  "items": [
    { "letter": "A", "paragraph": "1904.7(b)(5)(ii)(A)", "text": "Using a non-prescription medication at nonprescription strength ..." },
    { "letter": "D", "paragraph": "1904.7(b)(5)(ii)(D)", "text": "Using wound coverings such as bandages, Band-Aids™, gauze pads, etc.; or using butterfly bandages or Steri-Strips™ ..." }
  ]
}

curl -s 'https://www.job13.com/api/v1/exemptions?naics=4412' -H 'authorization: Bearer lb_test_sandbox'

{
  "naics": "4412",
  "partially_exempt": true,
  "description": "Other Motor Vehicle Dealers.",
  "summary": "NAICS 4412 (Other Motor Vehicle Dealers.) is listed in Appendix A to Subpart B, so this establishment is partially exempt ...",
  "caveat": "Partial exemption changes the DUTY TO RECORD, not whether a case meets the recording criteria ..."
}

curl -s https://www.job13.com/api/v1/treatments -H 'authorization: Bearer lb_test_sandbox'

{
  "count": 27,
  "treatments": [
    { "code": "wound_coverings_butterfly_steristrips", "kind": "first_aid", "first_aid_letter": "D", "label": "Wound coverings (bandages, gauze, butterfly bandages, Steri-Strips)" },
    { "code": "sutures_staples_or_surgical_glue", "kind": "medical_treatment", "first_aid_letter": null, "rationale": "Not on the exhaustive first-aid list; only butterfly bandages and Steri-Strips are first aid — 1904.7(b)(5)(ii)(D)." },
    { "code": "other_unlisted", "kind": "unknown", "rationale": "The first-aid list at 1904.7(b)(5)(ii) is exhaustive ..." }
  ],
  "work_relatedness_exceptions": [{ "numeral": "i", "paragraph": "1904.5(b)(2)(i)", "text": "At the time of the injury or illness, the employee was present in the work environment as a member of the general public rather than as an employee." }]
}

JSON-RPC 2.0 over HTTP (Streamable HTTP transport) at https://www.job13.com/api/mcp. Stateless — no session to resume, so a dropped connection is a non-event. Implements initialize, tools/list, tools/call and ping.

{
  "mcpServers": {
    "job13": {
      "type": "http",
      "url": "https://www.job13.com/api/mcp",
      "headers": {
        "Authorization": "Bearer lb_test_sandbox"
      }
    }
  }
}

• check_recordability

  Full 1904 determination with citations. Returns needs_review when the rule needs a fact you have not established.

• compute_incidence_rate

  TRIR / DART / DAFW on the 200,000-hour base. Null, never 0, without hours.

• get_1904_rule

  Verbatim text of a Part 1904 section.

• check_industry_exemption

  1904.2 Appendix A status for a NAICS code.

• list_first_aid_treatments

  The exhaustive (A)-(N) list plus the treatment vocabulary.

Every tool returns a readable text block carrying the citations inline, plus the raw object as structuredContent. The text exists so a model that paraphrases the verdict to a human still carries the provision with it.

curl -s https://www.job13.com/api/mcp \
  -H 'authorization: Bearer lb_test_sandbox' \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

curl -s https://www.job13.com/api/mcp \
  -H 'authorization: Bearer lb_test_sandbox' \
  -H 'content-type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "id": 2,
    "method": "tools/call",
    "params": {
      "name": "check_recordability",
      "arguments": {
        "occurredInWorkEnvironment": "yes",
        "isNewCase": "yes",
        "treatments": ["sutures_staples_or_surgical_glue"]
      }
    }
  }'

Protocol errors follow JSON-RPC: -32601 for an unknown method, -32602 for bad params — and a -32602 carries the same known_keys the REST API would return.

Errors are always {"error": {"code", "message", "docs_url", ...}}. When the offending field is an enum, the body carries known_keys — the complete list of accepted values — so a failed call can be fixed on the next attempt without a human reading these docs.

$ curl -s https://www.job13.com/api/v1/recordability \
    -H 'authorization: Bearer lb_test_sandbox' \
    -H 'content-type: application/json' \
    -d '{"occurredInWorkEnvironment":"yes","isNewCase":"yes","treatments":["stitches"]}'

{
  "error": {
    "code": "invalid_request",
    "message": "`treatments[0]` is not a recognised value.",
    "docs_url": "https://www.job13.com/docs/api#errors",
    "field": "treatments[0]",
    "received": "stitches",
    "known_keys": [
      "nonprescription_medication_nonprescription_strength",
      "tetanus_immunization",
      "...",
      "sutures_staples_or_surgical_glue",
      "other_unlisted",
      "none"
    ]
  }
}

Send an Idempotency-Key header on any POST. A replay with the same key and the same body returns the byte-identical original response, plus Idempotency-Replayed: true — so a caller that lost the first reply can tell a repeat from a fresh result. Reusing a key with a different body is a 409 rather than a silent wrong answer. Keys are held for 24 hours in memory, per instance.

curl -s https://www.job13.com/api/v1/recordability \
  -H 'authorization: Bearer lb_test_sandbox' \
  -H 'content-type: application/json' \
  -H 'idempotency-key: case-2026-0417-a' \
  -d '{"occurredInWorkEnvironment":"yes","isNewCase":"yes","treatments":["none"]}'

# Run it a second time with the same key:
#   → identical body, byte for byte
#   → Idempotency-Replayed: true

The sandbox key allows 25 requests per rolling 24 hours per IP. Every response — success or error — carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset (unix seconds). A 429 adds Retry-After. The counter is in-memory and per-instance, so it resets on deploy; account keys will use a durable store. See pricing for production volumes.

Job13is an administrative classification aid, not legal advice. Recordkeeping duties remain the employer’s under 29 CFR Part 1904.