Conversor IAE-CNAE
REMOTE · WWW.CONVERSORIAECNAE.ES · SCANNED SEP 24
The first fiscal MCP server for Spain: IAE/CNAE 2025, AEAT modelos, IRPF/IVA, RETA quota.
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 → Why this is hard to 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 19 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 Usability73
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1460 tokens (~76/item across 19 items; 19 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage74
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 23% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 19 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 19 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Conversor IAE-CNAE MCP server?
Conversor IAE-CNAE is a hosted endpoint at https://www.conversoriaecnae.es/api/mcp/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · www.conversoriaecnae.es
claude mcp add --transport http conversoriaecnae-conversor-iae-cnae 'https://www.conversoriaecnae.es/api/mcp/mcp'
{
"mcpServers": {
"conversoriaecnae-conversor-iae-cnae": {
"url": "https://www.conversoriaecnae.es/api/mcp/mcp"
}
}
} {
"servers": {
"conversoriaecnae-conversor-iae-cnae": {
"type": "http",
"url": "https://www.conversoriaecnae.es/api/mcp/mcp"
}
}
} [mcp_servers.conversoriaecnae-conversor-iae-cnae] url = "https://www.conversoriaecnae.es/api/mcp/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"conversoriaecnae-conversor-iae-cnae": {
"type": "remote",
"url": "https://www.conversoriaecnae.es/api/mcp/mcp",
"enabled": true
}
}
} openclaw mcp add conversoriaecnae-conversor-iae-cnae --url 'https://www.conversoriaecnae.es/api/mcp/mcp' --transport streamable-http
mcp_servers:
conversoriaecnae-conversor-iae-cnae:
url: "https://www.conversoriaecnae.es/api/mcp/mcp" {
"McpServers": {
"conversoriaecnae-conversor-iae-cnae": {
"Transport": "http",
"Url": "https://www.conversoriaecnae.es/api/mcp/mcp"
}
}
} assistant mcp add conversoriaecnae-conversor-iae-cnae -t streamable-http -u 'https://www.conversoriaecnae.es/api/mcp/mcp'
{
"mcpServers": {
"conversoriaecnae-conversor-iae-cnae": {
"type": "http",
"url": "https://www.conversoriaecnae.es/api/mcp/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.
- 26 Aug 26 78
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 25 Aug 26 0
- Stability: 0.97 → pass security
- 11 Aug 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 31 Jul 26 0
- 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 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 27 Jul 26 0
- 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 0
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 24 Sept 2026 · Probed https://www.conversoriaecnae.es/api/mcp/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=conversoriaecnae.es | CN=WE1,O=Google Trust Services,C=US | 4 Aug 2026 | 3 Nov 2026 | ECDSA 256 | ECDSA-SHA256 | b9c1749ceff3f7750efc94943c43f451 |
| SANs: conversoriaecnae.es, *.conversoriaecnae.es | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.conversoriaecnae.es. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| es. | present | 54404 | 8 | Verified |
| conversoriaecnae.es. | 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; preload |
| x-content-type-options | nosniff |
| x-frame-options | DENY |
| referrer-policy | strict-origin-when-cross-origin |
| permissions-policy | camera=(), microphone=(), geolocation=(), interest-cohort=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.conversoriaecnae.es/api/mcp/mcp | Verified | 200 | |
| http (plaintext) | http://www.conversoriaecnae.es/api/mcp/mcp | HTTPS enforced | 301 | https://www.conversoriaecnae.es/api/mcp/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. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
buscar_codigo Buscar código ~57
Busca códigos IAE/CNAE por descripción (búsqueda semántica). Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| q | string | yes | – |
| threshold | number | – | – |
| top_k | integer | – | – |
| type | string | – | – |
No output schema declared.
No examples provided.
buscar_doctrina_teac Buscar doctrina del TEAC ~70
Busca resoluciones y criterios del Tribunal Económico-Administrativo Central (TEAC) por tema o texto (IVA, IRPF, sociedades, procedimiento…). Devuelve número, asunto, criterio y enlace. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| query | string | yes | – |
No output schema declared.
No examples provided.
calendario_fiscal Calendario fiscal ~44
Modelos AEAT y próximos plazos para un código IAE/CNAE. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | – |
| code_type | string | – | – |
No output schema declared.
No examples provided.
consulta_dgt Consultas vinculantes DGT por texto ~139
Busca consultas vinculantes de la Dirección General de Tributos (DGT) por texto libre en español (stemming/acentos). Gratis: el resumen de la consulta más relevante. Con clave de pago (Authorization: Bearer cvr_…): la lista completa ordenada por relevancia y el filtro por código IAE. Solo doctrina pública, sin datos personales. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | – | Código IAE con puntos (p.ej. 659.3) para filtrar — solo plan de pago |
| query | string | yes | Texto a buscar, p.ej. 'recargo de equivalencia comercio menor' |
No output schema declared.
No examples provided.
consulta_masiva Consulta masiva ~53
Hasta 50 fichas IAE o CNAE en una llamada. Solo con clave de pago (Authorization: Bearer cvr_…).
| Name | Type | Req | Description |
|---|---|---|---|
| codes | array | yes | – |
| type | string | yes | – |
No output schema declared.
No examples provided.
cuota_irpf Cuota IRPF estatal ~70
Calcula la cuota íntegra ESTATAL del IRPF por suma marginal de tramos a partir de una base liquidable. No incluye escala autonómica ni mínimos. Datos públicos. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| anio | integer | – | – |
| base | number | yes | – |
| escala | string | – | – |
No output schema declared.
No examples provided.
cuota_reta Cuota RETA 2026 ~60
Calcula el tramo y la cuota mínima estimada de autónomos (RETA) por rendimiento neto. Datos públicos. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| anio | integer | – | – |
| neto | number | yes | – |
| tabla | string | – | – |
No output schema declared.
No examples provided.
describe_conversor Describe Conversor ~31
Auto-descripción del servicio: catálogos, RPCs y frescura de datos. Sin clave.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
detalle_cnae Detalle CNAE ~70
Ficha de un código CNAE 2025 (título, descripción, categoría, sector). Acceso gratuito sin clave. La correspondencia con IAE y CNAE 2009 y el enriquecimiento (ai_summary, fiscal_signals) requieren clave Profesional.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | – |
No output schema declared.
No examples provided.
detalle_cnae_2009 Detalle CNAE 2009 ~53
Ficha de un código CNAE 2009 (obsoleto). Acceso gratuito sin clave. La correspondencia a CNAE 2025 requiere clave Profesional.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | – |
No output schema declared.
No examples provided.
detalle_iae Detalle IAE ~96
Ficha de un epígrafe IAE (título, descripción, elegibilidad módulos). Acceso gratuito sin clave. La correspondencia IAE↔CNAE y el enriquecimiento (ai_summary, fiscal_signals) requieren clave Profesional. Acepta un código cualificado (p. ej. B831) para desambiguar epígrafes con varias secciones.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | – |
No output schema declared.
No examples provided.
empresas_por_actividad Empresas constituidas por actividad (CNAE) ~115
Devuelve estadísticas de constitución de empresas (recuento, capital medio/mediano, tendencia mensual, provincias) para un código CNAE-2025. Datos a nivel de empresa (Ley 37/2007), sin datos personales. Sin clave. La lista completa de constituciones recientes (denominación social) requiere clave Profesional; sin clave se devuelve una muestra de 3.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | Código CNAE-2025 (con o sin puntos), p.ej. 6820 |
No output schema declared.
No examples provided.
escala_irpf Escala IRPF estatal ~48
Tramos de la escala IRPF estatal (general o ahorro), año 2026. Datos públicos. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| anio | integer | – | – |
| escala | string | – | – |
No output schema declared.
No examples provided.
gastos_deducibles Gastos deducibles del autónomo ~48
Gastos deducibles del IRPF del autónomo (todos o por categoría). Datos públicos. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| anio | integer | – | – |
| categoria | string | – | – |
No output schema declared.
No examples provided.
modulos_irpf_iva Módulos IRPF/IVA ~64
Régimen de estimación objetiva (módulos) de un IAE. Acepta un slug opcional para desambiguar códigos con varias actividades. Datos públicos. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | – |
| slug | string | – | – |
No output schema declared.
No examples provided.
obligaciones_fiscales Obligaciones fiscales ~51
Modelos AEAT aplicables a un código (confianza, motivo, periodicidad, plazo). Datos públicos. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | – |
| code_type | string | – | – |
No output schema declared.
No examples provided.
subvenciones_por_actividad Subvenciones y ayudas abiertas por actividad (CNAE) ~142
Devuelve subvenciones/ayudas públicas ABIERTAS (convocatorias BDNS) para un código CNAE-2025: total abiertas, cuántas son para autónomos/PYME, y una muestra (título, órgano, ámbito, dotación, enlace oficial). Con plan de pago: lista completa y filtro solo_actividad. Solo convocatorias públicas, sin datos personales. Sin clave.
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | Código CNAE-2025 (con o sin puntos), p.ej. 4711 |
| solo_actividad | boolean | – | Solo ayudas dirigidas a autónomos/PYME/empresas |
No output schema declared.
No examples provided.
tarifa_at_ep Tarifa AT/EP por CNAE ~117
Tarifa de cotización por accidentes de trabajo y enfermedades profesionales (AT/EP) de una actividad CNAE-2025. Gratis: el tipo total + la nota de aplicación (por cuenta ajena; el autónomo cotiza al 1,30 %). El desglose IT/IMS y la cita normativa (source_anchor) requieren clave de pago (Authorization: Bearer cvr_…).
| Name | Type | Req | Description |
|---|---|---|---|
| code | string | yes | Código CNAE-2025 (con o sin puntos), p.ej. 6820 |
No output schema declared.
No examples provided.
texto_normativa Texto normativo BOE (consolidado y vigente) ~132
Texto consolidado y VIGENTE de un artículo del BOE (norma, rango, estado, texto legal, fecha de vigencia y enlace). Sin articulo: devuelve el índice de artículos vigentes de la norma. Solo texto en vigor (no histórico), citable como fuente oficial. Sin clave. Con clave: hechos + texto completo.
| Name | Type | Req | Description |
|---|---|---|---|
| articulo | string | – | Número de artículo a consultar, p.ej. 91 o 91 bis |
| boe_id | string | yes | Identificador BOE de la norma, p.ej. BOE-A-1992-28740 |
No output schema declared.
No examples provided.
What is the Conversor IAE-CNAE MCP server?
Conversor IAE-CNAE is an MCP server listed in the public MCP registry as io.github.conversoriaecnae/conversor-iae-cnae. The first fiscal MCP server for Spain: IAE/CNAE 2025, AEAT modelos, IRPF/IVA, RETA quota. This page covers its hosted endpoint (https://www.conversoriaecnae.es/api/mcp/mcp).
Is the Conversor IAE-CNAE MCP server safe to use?
Conversor IAE-CNAE scores 78 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Conversor IAE-CNAE MCP server expose?
Conversor IAE-CNAE exposes 19 tools: buscar_codigo, detalle_iae, detalle_cnae, detalle_cnae_2009, calendario_fiscal, and 14 more. Their descriptions and schemas cost roughly 1,460 tokens of context every time the server is loaded.
Does the Conversor IAE-CNAE MCP server require authentication?
No. We connected to Conversor IAE-CNAE without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Conversor IAE-CNAE MCP server still maintained?
Conversor IAE-CNAE is still listed as active in the MCP registry. We last reached this channel on 24 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.