Bring Digital Fax
to Pydantic AI
Learn how to connect Fax.Plus to Pydantic AI and start using 8 AI agent tools in minutes. Fully managed, enterprise secure, and ready to use without writing a single line of code.
What is the Fax.Plus MCP Server?
Connect your Fax.Plus account to any AI agent and take full control of your digital telephony and fax workflows through natural conversation.
What you can do
- Fax Orchestration — List and monitor all incoming and outgoing faxes and retrieve detailed status updates and delivery metadata programmatically
- Automated Sending — Programmatically send new faxes to any international number in E.164 format and add transmission comments directly through your agent
- Telephony Management — Search for and list available fax numbers across various countries and area codes to expand your business presence
- Outbox Oversight — Track active fax jobs and programmatically cancel pending transmissions before they are completed to save resources
- Account Visibility — Retrieve complete profile information, assigned numbers, and team member directories to maintain high-fidelity oversight
How it works
1. Subscribe to this server
2. Retrieve your Personal Access Token from Fax.Plus (Settings > Integrations)
3. Start managing your digital faxing from Claude, Cursor, or any MCP client
No more manual status checking or complex form navigation in the fax dashboard. Your AI acts as your dedicated digital fax and telephony coordinator.
Who is this for?
- Operations Managers — instantly check fax delivery statuses and manage telephony infrastructure using natural language commands
- Legal & Admin Teams — automate the sending of critical documents and track receipt without leaving your workspace
- Business Development — quickly find and assign new international fax numbers through simple AI queries
Built-in capabilities (8)
Requires the unique outbox job ID. Cancel a pending fax job
Use this to determine the current identity and account context. Retrieve current Fax.Plus account details
Includes information about the recipient, sender, and delivery status. Get details for a specific fax
Includes the number itself and its activation status. List all assigned fax numbers
Use this to monitor communication history and obtain fax IDs. List received and sent faxes
Useful for monitoring ongoing transmissions. List active or pending fax jobs
Useful for expanding telephony infrastructure. Search for available fax numbers
Requires the recipient phone number in E.164 format and allows for optional comments. Files are typically managed via the Fax.Plus outbox logic. Send a new digital fax
Why Pydantic AI?
Pydantic AI validates every Fax.Plus tool response against typed schemas, catching data inconsistencies at build time. Connect 8 tools through Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code. full type safety, structured output guarantees, and dependency injection for testable agents.
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Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application
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Model-agnostic architecture. switch between OpenAI, Anthropic, or Gemini without changing your Fax.Plus integration code
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Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors
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Dependency injection system cleanly separates your Fax.Plus connection logic from agent behavior for testable, maintainable code
Fax.Plus in Pydantic AI
Fax.Plus and 3,400+ other MCP servers. One platform. One governance layer.
Teams that connect Fax.Plus to Pydantic AI through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 3,400+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for Fax.Plus in Pydantic AI
The Fax.Plus MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 8 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Pydantic AI only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
Fax.Plus for Pydantic AI
Every tool call from Pydantic AI to the Fax.Plus MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
How do I find my Personal Access Token?
Log in to your Fax.Plus dashboard, navigate to Settings > Integrations, and generate a new token under the Personal Access Token section.
What is the correct format for fax numbers?
Fax numbers must be in international E.164 format, including the plus sign and country code (e.g., +1234567890).
Can I cancel a fax before it is sent?
Yes! Use the cancel_outbox_job tool with the unique outbox job ID to stop a transmission that is still pending or sending.
How does Pydantic AI discover MCP tools?
Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.
Does Pydantic AI validate MCP tool responses?
Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.
Can I switch LLM providers without changing MCP code?
Absolutely. Pydantic AI abstracts the model layer. your Fax.Plus MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.
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Update: pip install --upgrade pydantic-ai