# Tallyfern Rates (Canada)

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

- name: com.tallyfern/rates
- version: 0.2.0
- connection class: R0 (autonomous)
- trust: 82/100 flags: no-repository
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.tallyfern%2Frates
- tools: https://api.protogrid.dev/v1/servers/com.tallyfern%2Frates/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "rates": {
      "type": "http",
      "url": "https://mcp.tallyfern.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 98
- freshness: 100
- provenance: 55
- drivers: +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.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 5 of 5 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,103 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 5 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 5, about 1,103 tokens to load them all
- tool set hash: 57e21d43ad87f9b0a32f1ba169805d09
- tools last changed: 2026-10-03T22:36:57.771Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.tallyfern/rates.svg)](https://protogrid.dev/servers/com.tallyfern/rates)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-03 `ontario_hst_basics` changed (outputSchema)
- 2026-10-03 `cra_meal_travel_allowance` changed (inputSchema, outputSchema)
- 2026-10-03 `cra_automobile_allowance_rate` changed (outputSchema)
- 2026-10-03 `gst_hst_rate_by_province` changed (outputSchema)
- 2026-10-03 `gst_hst_small_supplier_check` changed (inputSchema, outputSchema)

Full history: https://api.protogrid.dev/v1/servers/com.tallyfern%2Frates/changes

## Remotes

- https://mcp.tallyfern.com/mcp (streamable-http, auth none, reachable true, uptime30d 0.953125)

## Packages

_none_

## Tools (5)

- `cra_automobile_allowance_rate`: CRA 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_allowance`: CRA 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_province`: Current 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_check`: Apply 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_basics`: Plain-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.