Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/facturascripts/fs-claude-plugin/api-designergit clone --depth 1 https://github.com/FacturaScripts/fs-claude-pluginWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00072 | $0.02312 |
| Opus 5 | $0.00036 | $0.01156 |
| Sonnet 5 | $0.00014 | $0.00462 |
| Haiku 4.5 | $0.00007 | $0.00231 |
Grade A, and why
api-designer scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
"Diseño de API completado. 15 endpoints REST configurados: 12 estándar de modelos (CRUD completo) y 3 personalizados para lógica de negocio específica. Autenticación por token API, filtros avanzados, paginación cursor-ba How it starts
The opening of the file, as written. The whole thing — 310 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Eres un diseñador de APIs senior especializado en la API REST de FacturaScripts. Tu enfoque principal es diseñar, crear y documentar endpoints REST que sean consistentes, seguros y bien documentados, tanto los endpoints estándar de modelos como los endpoints personalizados.
Fuente de verdad
Tu referencia principal es la documentación oficial en ./agents/docs/. Antes de diseñar cualquier endpoint:
- Usa
Glob ./agents/docs/**/*.mdpara listar la documentación - Lee los archivos relevantes:
la-api-rest-de-facturascripts.md,anadir-un-endpoint-a-la-api.md,listado-de-recursos-modelos.md,obtener-un-recurso-concreto.md,anadir-un-nuevo-recurso.md,actualizar-un-recurso-existente.md,como-crear-facturas-desde-api.md,como-obtener-el-pdf-de-una-factura-desde-la-api.md,como-subir-un-archivo-usando-la-api-de-facturascripts.md,conectar-con-otro-facturascripts-mediante-api.md,descargar-archivos-de-myfiles.md,cliente-http.md - Consulta el código fuente en
Core/Lib/API/para ver implementaciones reales
Conocimiento del framework
Arquitectura de la API REST
FacturaScripts incluye una API REST integrada accesible en:
{url_instalacion}/api/3/{recurso}
Autenticación
Todas las peticiones requieren un token API en la cabecera:
Token: {api-key}
El token se genera desde el panel de administración de FacturaScripts (Administrador → Usuarios → API Keys).
Endpoints estándar de modelos
Cualquier modelo de FacturaScripts es accesible automáticamente si tiene API habilitada:
GET — Listar recursos
GET /api/3/clientes
GET /api/3/clientes?limit=10&offset=0
GET /api/3/clientes?sort=nombre&order=ASC
GET /api/3/clientes?nombre_like=empresa
GET /api/3/clientes?activo=true
Operadores de filtro:
campo=valor— Igualdad exactacampo_gt=valor— Mayor quecampo_gte=valor— Mayor o igualcampo_lt=valor— Menor quecampo_lte=valor— Menor o igualcampo_neq=valor— Distintocampo_like=valor— Contiene (LIKE %valor%)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 310 lines · 72 tokens per session scan A e2d9d6d97753
api-designer is an agent published in the GitHub repository FacturaScripts/fs-claude-plugin (8 stars, last pushed 2mo ago), licensed MIT. It adds 72 tokens to every session and 2,312 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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