djangorestframework-pydantic-ai

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Expose djangorestframework-services services and selectors as a Pydantic-AI toolset, so a plain pydantic_ai.Agent can call them as tools — no MCP server and no AG-UI bridge in the path.

Every tool call routes through drf-services' transport-neutral surface (dispatch_spec plus its off-HTTP helpers), so a tool call runs the same input validation, the same permission_classes — both class-level has_permission and object-level has_object_permission on the resolved row — and the same serializer rendering your DRF views apply, just without the HTTP hop.

Install

pip install djangorestframework-pydantic-ai

It depends only on djangorestframework-services and pydantic-ai-slim. A model provider is pulled in separately, the usual Pydantic-AI way (e.g. pip install "pydantic-ai-slim[anthropic]").

Quickstart

from pydantic_ai import Agent
from rest_framework_pydantic_ai import AgentDeps, SpecToolset

toolset = SpecToolset(
    {
        "list_orders": orders_selector_spec,  # SelectorSpec -> read-only tool
        "create_order": create_order_spec,  # ServiceSpec  -> mutation tool
    }
)

agent = Agent("anthropic:claude-opus-4-8", deps_type=AgentDeps, toolsets=[toolset])

result = await agent.run(
    "create an order of 3 widgets",
    deps=AgentDeps(user=request.user),
)

The agent acts as deps.user: each call builds an off-HTTP request/view context, enforces the spec's permission_classes (class- and object-level), dispatches the spec, and renders the result through the spec's serializer. List selectors gain page / limit / order tool args.

Failures map onto the model loop so the agent self-corrects: invalid input, a bad page / limit / order value, and unexpected (hallucinated) arguments come back as ModelRetry; a business error or missing row becomes a readable {"error": ...}; a denied permission raises PermissionDenied, which aborts the run under a plain pydantic_ai.Agent. A host that installs a tool-failure policy — django-pydantic-agent's build_agent does by default — turns that denial into a failed-tool result instead, so the run continues; the call is still denied either way. Unexpected arguments are rejected by default — pass unknown_arguments= to SpecToolset (IGNORE / PASSTHROUGH) to change that.

See the documentation for the full reference.

License

MIT

Project links

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Credits

Author: Artur Veres

GitHub Statistics

Data verified by PyPI on Aug 26, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License (MIT)

Requires

Python >=3.10

Provides Extra

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Tags

agent ai django drf llm pydantic-ai rest-framework tools

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