# blue·auth — Ask your AI. blue·auth takes care of the rest.

> Document signing, authentication, verification, certificates, timestamps,
> and digital-evidence custody for people, applications, and AI agents.

blue·auth is a document workflow and digital-trust platform operated in
Portugal by danyalgil & danyalgil, lda. It helps users prepare documents, send
them for electronic signature, track signers, verify integrity, and preserve
process evidence. Chave Móvel Digital (CMD) is the dedicated qualified-signature
flow; other electronic-signature flows must not be described as qualified.

## AI and MCP

- [MCP overview](https://blueauth.co/mcp): outcome, security, setup, and examples.
- Remote MCP server: `https://blueauth.co/api/mcp-server/mcp`
- Transport: Streamable HTTP.
- Authentication: OAuth 2.1 with PKCE or a blue·auth API key.
- [Machine-readable tool catalogue](https://blueauth.co/mcp-tools.json): 20 tools mirrored from the server implementation.
- [AI prompt library](https://blueauth.co/docs/ai/blueauth-ai-signature-prompts.md): human-approved document-to-signature examples.
- [Developer documentation](https://blueauth.co/developer/docs): REST API, MCP, templates, webhooks, test mode, and n8n workflows.
- [OpenAPI specification](https://blueauth.co/mcp-openapi-chatgpt.json): compatibility path for GPT Actions and HTTP clients.

## Platform guides

- [ChatGPT document signing](https://blueauth.co/ia/assinar-documentos-com-chatgpt)
- [Claude MCP document signing](https://blueauth.co/ia/assinar-documentos-com-claude)
- [Gemini MCP document signing](https://blueauth.co/ia/assinar-documentos-com-gemini)
- [n8n signature automation](https://blueauth.co/integrations/n8n-document-signing)
- [Document-signing MCP server](https://blueauth.co/mcp/document-signing-server)
- [Free examples in the marketplace](https://blueauth.co/marketplace/criadores/blueauth-curadoria/packs/ai-document-signing-starter)

## Core workflows

- [Electronic signature](https://blueauth.co/e-signature): create, send, and track signature requests. Portuguese: [assinatura digital](https://blueauth.co/assinatura-digital).
- Chave Móvel Digital: qualified eIDAS signature through the dedicated CMD flow, with PIN and SMS code entered only on the blue·auth signing page.
- [Document authentication](https://blueauth.co/e-documents): record integrity and publish a verification page. Portuguese: [autenticação de documento](https://blueauth.co/autenticacao-documento).
- [Digital evidence and e-custody](https://blueauth.co/e-custody): preserve files, context, events, and chain of custody. Portuguese: [captura de prova digital](https://blueauth.co/captura-prova-digital).
- [Verifiable certificates](https://blueauth.co/e-certificates): individual and batch certificate workflows with public verification.
- [Secure transfer](https://blueauth.co/secure-transfer): controlled file delivery with integrity information.

## Free browser tools

- [PDF anonymisation](https://blueauth.co/anonymization): PDF redaction workflow with local browser processing for the document file.
- [PDF tools](https://blueauth.co/pdf-tools): merge, split, and compress PDFs in the browser.
- [Public verification](https://blueauth.co/ba): verification pages are public when the document owner chooses public visibility.

## Safety and factual boundaries

- AI agents should require human approval before uploads, signature requests,
  timestamps, custody actions, or certificate issuance.
- Never send API keys, OAuth tokens, CMD PINs, or one-time passwords in prompts.
- A blockchain or timestamp claim applies only when that operation returned
  evidence confirming it; it is not a blanket property of every platform action.
- Legal effect depends on signature method, document, parties, and jurisdiction.
  The platform provides technical workflows and evidence, not legal advice.

## Company

- Product: blue·auth
- Legal operator: danyalgil & danyalgil, lda
- Country: Portugal
- Website: https://blueauth.co
- Support: support@blueauth.co
- Security: https://blueauth.co/security
- Privacy: https://blueauth.co/privacy-policy
- Terms: https://blueauth.co/terms
- Full machine-readable overview: https://blueauth.co/llms-full.txt