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Passage Data — cited environmental limits

Registre officiel Autres

Cited US, Canadian, EU limits (discharge, drinking water, soil, air); species status; DwC archives

Code source Site web Documentation

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http passage-data-cited-environmental-limits 'https://passage-data.com/mcp'
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "passage-data-cited-environmental-limits": {
            "type": "http",
            "url": "https://passage-data.com/mcp"
        }
    }
}

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. Passage Data — cited environmental limits (MCP server)
  2. Connect
  3. Tools
  4. Example
  5. What is held
  6. Terms

Passage Data — cited environmental limits (MCP server)

A remote MCP server and HTTP API for numeric environmental limits read from the regulations themselves: effluent and discharge limits, surface-water and groundwater quality criteria, drinking-water standards, soil and groundwater screening values, ambient-air guidelines and emission limits, for the US (federal rules and the states), Canada (federal, every province and territory), Germany, France, Italy and the EU. It also reports the status a species holds under the species-at-risk registers it holds.

Every row is cited: instrument, edition, section or page, the quoted text, and the source file's URL and sha256. When nothing is held, the answer is a coded refusal naming every instrument searched, never an empty list.

  • MCP endpoint: https://passage-data.com/mcp (Streamable HTTP, no key)
  • HTTP API: https://passage-data.com/api/v1/ (JSON, no key; GET, and POST for a table or a list)
  • Full reference for agents: passage-data.com/llms.txt · OpenAPI 3.1
  • Registry name: io.github.kedu21-beep/passage-data

Connect

Claude Code

claude mcp add --transport http passage-data https://passage-data.com/mcp

Claude (web or desktop), ChatGPT (developer mode), and other clients: add a custom connector or remote MCP server with the URL https://passage-data.com/mcp. No key or sign-in.

Cursor (mcp.json):

{ "mcpServers": { "passage-data": { "url": "https://passage-data.com/mcp" } } }

Tools

ToolWhat it answers
find_limitsNumeric limits and guidelines for one substance or measure (a name or CAS number), optionally by place (ISO 3166: US-OH, CA-QC, DE, EU), medium, statistic and kind. A place also searches the places above it.
check_valueWhether one measured value (with its unit) is over, under or within each row find_limits would return. Units convert exactly within a family; a row that cannot be compared says why (a hardness- or pH-dependent criterion, a narrative limit, a unit of another family).
check_valuesA lab table in one call: up to 200 rows of parameter, value and unit for one place, each answered by check_value, with each held limit sent once and a count of the rows over. A row that cannot be read (an unknown parameter, a value below detection such as <0.005) gets its own coded refusal.
verify_claimWhether a limit held says what a sentence says (an AI's answer, a report): confirmed with the row's cite, contradicted with the numbers held, or a refusal when nothing is held to judge it by.
list_sourcesEvery instrument held for a place: title, issuer, edition, what it governs, rows read, source URL and sha256.
get_permitOne US NPDES discharge permit from EPA's national file: limits by outfall, renewal due date, the last 12 months' values over a limit.
find_designationsThe status a species holds under each register held: US ESA, SARA and COSEWIC, provincial and territorial acts, IUCN Red List, CITES, CMS, EU Habitats and Birds Directives, UK schedules. Each cited to the line the register prints.
screen_speciesA species list in one call: up to 500 names for one place or everywhere, each answered by find_designations, with each register sent once and the registers that are silent on a name.
map_to_darwin_coreThe Darwin Core term each column of a species occurrence or checklist file maps to, the rule that decided it, and the GBIF-required terms no column carries.
searchFree-text search over everything held (a substance and a place, a species, an instrument's title, an NPDES permit number), returning ids for fetch.
fetchOne document search returned, as text: every cited row for a parameter in a place, what each register says about a species, or what is held for a place.

All tools are read-only and idempotent.

Example

curl -s -X POST https://passage-data.com/mcp \
  -H "content-type: application/json" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"find_limits","arguments":{"parameter":"ammonia","place":"US-OH","medium":"surface_water"}}}'

or over plain HTTP:

curl -s "https://passage-data.com/api/v1/limits?parameter=ammonia&place=US-OH&medium=surface_water"

A lab table or a species list goes in one POST:

curl -s -X POST https://passage-data.com/api/v1/check -H "content-type: application/json"   -d '{"place":"CA-QC","medium":"water_discharge","rows":[{"parameter":"copper","value":0.15,"unit":"mg/L"},{"parameter":"zinc","value":0.4,"unit":"mg/L"}]}'
curl -s -X POST https://passage-data.com/api/v1/designations -H "content-type: application/json"   -d '{"place":"CA-ON","species":["Myotis lucifugus","Emydoidea blandingii"]}'

Each row carries value, unit, statistic, direction, kind, medium, place, conditions as printed, and a cite block (instrument, title, issuer, edition, section, page, quote, source_url, source_sha256). More in examples/.

What is held

The live counts are on the service card: passage-data.com/api/v1/ (held). On 2026-10-14 the card said 247 instruments, 98,587 rows, 5,910 parameters and 74 places, plus 34 species registers holding 213,742 entries.

Terms

  • The data is read from public law and public agency files. Check the cited source before relying on a value. A refusal is a statement about our sources, not about the law of a place or the protection of a species.
  • Free while in preview. Calls are rate-limited (30 requests per 10 seconds per caller; a blocked call gets HTTP 429 with Retry-After).
  • We keep what is asked (tool, place, parameter or species name, outcome), the name and version the calling program gives, the network it calls from (operator and country, as Cloudflare reports them) and how many distinct callers a day; never an IP address, an account or a person.

This repository holds the server's listing and examples. The server itself is hosted at passage-data.com; its code is not public.

Questions fréquentes

Qu'est-ce que Passage Data — cited environmental limits ?

Cited US, Canadian, EU limits (discharge, drinking water, soil, air); species status; DwC archives

Comment installer Passage Data — cited environmental limits ?

Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport http passage-data-cited-environmental-limits 'https://passage-data.com/mcp'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour Passage Data — cited environmental limits ?

Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.

Passage Data — cited environmental limits est-il open source ?

Son code est public sur GitHub, mais le dépôt ne déclare pas de licence standard.

Qui maintient Passage Data — cited environmental limits ?

Il est publié par kedu21-beep. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.