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Tallyfern Rates (Canada)

R0· no sign-in

Read-only Canadian GST/HST rates, small-supplier check and CRA allowance rates, with CRA sources.

v0.2.0 · active · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality91strong
Trust82of 100
Uptime, 30 days95%
Latency p50259 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "rates": {
      "type": "http",
      "url": "https://mcp.tallyfern.com/mcp"
    }
  }
}
claude mcp add --transport http rates https://mcp.tallyfern.com/mcp
[mcp_servers.rates]
url = "https://mcp.tallyfern.com/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "rates": {
      "type": "remote",
      "url": "https://mcp.tallyfern.com/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "rates": {
      "type": "http",
      "url": "https://mcp.tallyfern.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=rates&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbWNwLnRhbGx5ZmVybi5jb20vbWNwIn0%3D"
}
{
  "servers": {
    "rates": {
      "type": "http",
      "url": "https://mcp.tallyfern.com/mcp"
    }
  }
}
{
  "mcpServers": {
    "rates": {
      "httpUrl": "https://mcp.tallyfern.com/mcp"
    }
  }
}
extensions:
  "rates":
    enabled: true
    name: "rates"
    type: streamable_http
    uri: "https://mcp.tallyfern.com/mcp"
    timeout: 300

Quality 91 / 100strong

protocol75 · weight 25
  • warn
    protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
  • n/a
    protocol.statelessonly applies to 2026-07-28 servers
  • pass
    protocol.transportstreamable HTTP
  • n/a
    protocol.list_ttlonly applies to 2026-07-28 servers
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations5 of 5 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 1,103 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changes5 tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

5 tools, about 1,103 tokens to load them all · tool set 57e21d43ad87 · tools last changed 2026-10-03 · checked 2026-10-20 10:03 UTC

Tool changes

  • ontario_hst_basicschangedoutput schema
  • cra_meal_travel_allowancechangedinput schema, output schema
  • cra_automobile_allowance_ratechangedoutput schema
  • gst_hst_rate_by_provincechangedoutput schema
  • gst_hst_small_supplier_checkchangedinput schema, output schema

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 82 / 100

no-repository
provenance55
liveness98
freshness100
hygiene80

+dns-namespace +website +reachable +uptime-95% +updated-17d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://mcp.tallyfern.com/mcp streamable-httpnoneyes95%259 ms2025-11-252026-10-20

Tools (5)

cra_automobile_allowance_rateread-onlyCRA reasonable per-kilometre allowance rates for employer-paid vehicle allowances (2026 default; 2025 also available): first 5,000 km and after, provinces vs territories. Optionally calculates the allowance for a number of business kilometres.
cra_meal_travel_allowanceread-onlyCRA simplified-method rates (latest published tax year): flat meal rate per meal and maximum per day, and vehicle cents/km by province or territory where travel begins. These apply to moving expenses, northern residents deductions and medical travel, not to employer per-diems. Optionally calculates amounts.
gst_hst_rate_by_provinceread-onlyCurrent GST/HST rate for a Canadian province or territory (or all 13), with the PST/QST rate CRA lists for reference. From CRA's 'Charge and collect the GST/HST' table.
gst_hst_small_supplier_checkread-onlyApply the CRA's $30,000 small-supplier tests (single calendar quarter and four consecutive calendar quarters) to taxable revenue by calendar quarter. Says whether the person must register for the GST/HST, when they stop being a small supplier, the effective date of registration, and headroom for next quarter. Most businesses only (not charities/public service bodies).
ontario_hst_basicsread-onlyPlain-language basics for Ontario businesses: the 13% HST rate, the $30,000 small-supplier threshold, the 29-day registration deadline and place-of-supply rule, with CRA sources.

Schemas: list_tools.

Similar MCP servers

Official server.json
{
  "name": "com.tallyfern/rates",
  "title": "Tallyfern Rates (Canada)",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://mcp.tallyfern.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.2.0",
  "websiteUrl": "https://tallyfern.com/",
  "description": "Read-only Canadian GST/HST rates, small-supplier check and CRA allowance rates, with CRA sources."
}