Mexican Payroll & Tax Calculator
REMOTE · FISCAL.TINYAPIS.DEV · SCANNED AUG 3
Deterministic Mexican payroll & tax math: finiquito, ISR, aguinaldo, IMSS (2026 tables).
Available components
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 →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability65
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 879 tokens (~219/item across 4 items; 4 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 Management27
- Stability observed for 8 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
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · fiscal.tinyapis.dev
claude mcp add --transport http dev-tinyapis-mx-fiscal https://fiscal.tinyapis.dev/mcp
[mcp_servers.dev-tinyapis-mx-fiscal] url = "https://fiscal.tinyapis.dev/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"dev-tinyapis-mx-fiscal": {
"type": "remote",
"url": "https://fiscal.tinyapis.dev/mcp",
"enabled": true
}
}
} openclaw mcp add dev-tinyapis-mx-fiscal --url https://fiscal.tinyapis.dev/mcp --transport streamable-http
mcp_servers:
dev-tinyapis-mx-fiscal:
url: "https://fiscal.tinyapis.dev/mcp" {
"mcpServers": {
"dev-tinyapis-mx-fiscal": {
"type": "http",
"url": "https://fiscal.tinyapis.dev/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
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.
- 2 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 62
First indexed and scored.
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 3 Aug 2026 · Probed https://fiscal.tinyapis.dev/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=fiscal.tinyapis.dev | CN=YR2,O=Let's Encrypt,C=US | 9 Jul 2026 | 7 Oct 2026 | RSA 4096 | SHA256-RSA | 525864ffbe1c1313e199e78851c8cc16036 |
| SANs: fiscal.tinyapis.dev | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
DNSSEC insecure
Validation of fiscal.tinyapis.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| tinyapis.dev. | 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 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000; includeSubDomains |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://fiscal.tinyapis.dev/mcp | Verified | 200 | |
| http (plaintext) | http://fiscal.tinyapis.dev/mcp | HTTPS enforced | 302 | https://fiscal.tinyapis.dev/mcp |
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.
calc_aguinaldo ~179
Compute a Mexican aguinaldo (year-end bonus): gross, the UMA-based exempt portion, the taxable portion, its ISR, and the net. Minimum 15 days by law. Do NOT compute from memory — the exemption is UMA-indexed per year. Returns gross, taxable, exempt, isr, net, and the days used.
| Name | Type | Req | Description |
|---|---|---|---|
| aguinaldo_days | integer | — | Aguinaldo days (defaults to the legal 15). |
| daily_salary | number | yes | Daily salary (MXN). |
| days_worked | integer | yes | Days worked in the year. |
| monthly_ordinary_salary | number | — | Monthly ordinary salary for ISR (defaults to daily x 30.4). |
| paid_in_january | boolean | — | January UMA boundary. |
| year | integer | — | Tax-table year. |
No output schema declared.
No examples provided.
calc_finiquito ~323
Compute a Mexican finiquito/liquidación (severance) for a resignation or an unjustified dismissal: prorated christmas bonus, vacations, vacation premium, pending salary, and (for dismissal) 90-day + 20-day/year severance and the seniority premium, with Art. 93 exemptions and separation ISR. Do NOT compute this from memory — LFT bands, UMA exemptions, and the SDI integration factor are table-driven. Returns per-concept gross/exempt/taxable, totals, ISR, deductions, and net_total.
| Name | Type | Req | Description |
|---|---|---|---|
| daily_salary | number | yes | Daily salary (MXN). |
| deductions | array | — | Optional pass-through deductions. |
| hire_date | string | yes | Hire date, YYYY-MM-DD. |
| include_20_days_per_year | boolean | — | Include the 20-day/year dismissal indemnity. |
| monthly_ordinary_salary | number | — | Monthly ordinary salary for ISR (defaults to daily x 30.4). |
| paid_in_january | boolean | — | January UMA boundary. |
| pending_days | integer | — | Unpaid worked days pending. |
| prima_vacacional_pct | number | — | Vacation premium percentage (defaults to the legal 25%). |
| termination_date | string | yes | Termination date, YYYY-MM-DD. |
| termination_type | string | yes | Type of separation. |
| vacation_proration | string | — | Vacation proration basis. |
| year | integer | — | Tax-table year. |
| zone | string | — | Minimum-wage zone. |
No output schema declared.
No examples provided.
calc_imss ~247
Compute Mexican IMSS social-security contributions: the SDI (integrated daily wage by seniority) and SBC, plus employer/worker quotas for the five insurance branches. The work-risk premium (rt_premium) is an input. Provide either seniority_years (to derive the SDI) or an explicit sdi. Do NOT compute from memory — quota tables and UMA caps are table-driven. Returns sdi, sbc, employer_total, worker_total, grand_total, and a per-branch breakdown.
| Name | Type | Req | Description |
|---|---|---|---|
| daily_salary | number | — | Daily salary (MXN); with seniority_years derives the SDI. |
| days | integer | — | Number of days to bill. |
| paid_in_january | boolean | — | January UMA boundary. |
| rt_premium | number | yes | Work-risk premium (fraction, e.g. 0.005). |
| sdi | number | — | Explicit integrated daily wage, if not deriving from salary. |
| seniority_years | integer | — | Completed years of seniority (for the SDI integration factor). |
| year | integer | — | Tax-table year. |
| zone | string | — | Minimum-wage zone. |
No output schema declared.
No examples provided.
calc_isr ~130
Compute Mexican ISR (income tax) withholding for a monthly or annual income using the official SAT tables and employment subsidy. Do NOT estimate ISR from memory — brackets and subsidy change yearly and must come from this deterministic tool. Returns tax, subsidy_applied, withholding, the period, and the tax-table year used.
| Name | Type | Req | Description |
|---|---|---|---|
| income | number | yes | Gross income for the period (MXN). |
| paid_in_january | boolean | — | January UMA boundary (2025 vs 2026 tables). |
| period | string | — | Tax period. |
| year | integer | — | Tax-table year. |
No output schema declared.
No examples provided.