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unifiedagentprotocol

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The Unified Agent Protocol (UAP) is an open interoperability layer for defining, registering, executing, and orchestrating AI agents and tools across diverse ecosystems. It standardizes how agents and tools are described and translated between platforms like LangChain, OpenWebUI, OpenAPI, and MCP — enabling portable, composable, and vendor-neutral

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# Unified Agent Protocol (UAP) — Core SDK

**Version 1.0** · Apache-2.0 · Python 3.10+

UAP is the **universal interoperability layer** for AI agents and tools.

Define an agent **once** in UAP — then ship it to **MCP**, **A2A**,
**OpenAI Assistants**, **Anthropic Tool Use**, **Google Gemini
Functions**, **OpenAPI 3**, **OpenWebUI**, **LangChain** — without
rewriting a single field. Every adapter is **bidirectional** and
declares its **LossInfo** explicitly. No silent data loss.

## What UAP gives you over MCP / A2A alone

| Concern | MCP | A2A | UAP |
|---------|:---:|:---:|:---:|
| Tool description schema | ✅ | — | ✅ |
| Agent-to-Agent runtime | — | ✅ | ✅ (via bridges) |
| Cross-vendor bridges | — | — | ✅ (9 formats) |
| Bidirectional round-trip | — | — | ✅ |
| Auth modelling (OAuth2/mTLS/SigV4/…) | partial | partial | ✅ |
| RBAC / Capabilities | — | — | ✅ |
| Compliance (GDPR/HIPAA/residency) | — | — | ✅ |
| Cost / latency hints | — | — | ✅ |
| URN identity | — | — | ✅ |
| Versioned wire format | ✅ | ✅ | ✅ |

## Install

```bash
pip install unified-agent-protocol            # core SDK only
pip install unified-agent-protocol[runtime]   # + FastAPI runtime
pip install unified-agent-protocol[all]       # + every optional dep
```

## Quick start

```python
from unifiedagentprotocol import (
    Tool, Agent, Skill, Parameter, ParameterSchema,
    Capabilities, SideEffects, Compliance, DataClassification,
    AuthConfig, AuthType, Endpoint, Transport, Envelope,
)

weather = Tool(
    id="urn:uap:tool:get-weather",
    name="get_weather",
    description="Return current weather for a city.",
    parameters=[Parameter(name="city", schema=ParameterSchema(type="string"))],
    endpoint=Endpoint(transport=Transport.HTTP,
                      url="https://api.example.com/weather", method="POST"),
    auth=AuthConfig(type=AuthType.API_KEY,
                    secret_ref="vault://kv/data/weather#token"),
    capabilities=Capabilities(idempotent=True,
                              side_effects=SideEffects.READ_ONLY,
                              deterministic=False,
                              requires_human_approval=False),
    compliance=Compliance(data_classification=DataClassification.PUBLIC,
                          regulations=["GDPR"], data_residency=["EU"]),
)

agent = Agent(
    id="urn:uap:agent:weather-bot",
    name="WeatherBot",
    description="Provides weather information.",
    tools=[weather],
    skills=[Skill(id="answer-weather", name="answer-weather",
                  description="Answer weather questions.")],
    endpoints=[Endpoint(transport=Transport.HTTP, url="https://bot.example.com")],
)

print(Envelope.of(agent).to_wire())
```

Ship it to every ecosystem:

```python
from unifiedagentprotocol.bridges.mcp        import to_mcp
from unifiedagentprotocol.bridges.a2a        import to_a2a
from unifiedagentprotocol.bridges.openai     import to_openai
from unifiedagentprotocol.bridges.anthropic  import to_anthropic
from unifiedagentprotocol.bridges.gemini     import to_gemini
from unifiedagentprotocol.bridges.openapi    import to_openapi

mcp_payload,    _ = to_mcp(agent)
a2a_card,       _ = to_a2a(agent)
oai_assistant,  _ = to_openai(agent)
claude_tool,    _ = to_anthropic(weather)
gemini_decl,    _ = to_gemini(weather)
openapi_spec,   _ = to_openapi(agent)
```

Every bridge also has an inverse `from_<format>(…)` returning
`(uap_object, LossInfo)`.

## CLI

```bash
uap version
uap schema-export --output-dir schemas/uap/1.0
uap bind  --input my_tool.json --format mcp --show-loss
uap validate --input my_agent.json
uap lint --input my_agent.json
uap serve --registry-path ./registry --port 8000
```

The auto-detect `bind` accepts MCP, A2A, OpenAI, Anthropic, OpenWebUI,
LangChain, OpenAPI 3, Swagger 2 and bare UAP envelopes.

## Governed directory matching

The optional runtime includes a side-effect-free matcher for applications that
project tenant, availability, capacity and evaluation data into UAP Agent
metadata:

```python
from unifiedagentprotocol.runtime import match_agents

candidates = match_agents(
    registry,
    tenant_id="tenant-a",
    required_capabilities=["research", "evidence"],
    delegation_chain=["urn:uap:agent:requester"],
)
```

Matching fails closed for missing tenant/availability/capacity metadata, avoids
agents already in the delegation chain, and excludes external agents unless
they are both explicitly requested and marked approved. It does not create a
task or open an external boundary; the embedding application remains
responsible for authorization, budget/HITL policy and source-owned audit.

## Architecture

```
┌──────────────────────────────────────────────────────────────┐
│  Runtime  (optional)   FastAPI adapter, /.well-known/agent   │
├──────────────────────────────────────────────────────────────┤
│  Registry (optional)   In-memory / Filesystem / pluggable    │
├──────────────────────────────────────────────────────────────┤
│  Bridges               MCP, A2A, OpenAI, Anthropic, Gemini,  │
│  (bidirectional)       OpenAPI, Swagger, OpenWebUI, LangChain│
├──────────────────────────────────────────────────────────────┤
│  Core IR (Schema)      Tool, Agent, Parameter (JSON-Schema), │
│                        Auth, Capabilities, Compliance, Cost, │
│                        Endpoint, Trigger, Envelope, LossInfo │
├──────────────────────────────────────────────────────────────┤
│  Wire Spec             schemas/uap/1.0/*.schema.json         │
└──────────────────────────────────────────────────────────────┘
```

Layer rules:

- `core/` depends on nothing but Pydantic + stdlib.
- `bridges/<x>/` depends only on `core/`.
- `runtime/` depends on `core/`, `bridges/`, `registry_impl/`.
- `cli/` is the only module allowed to import anywhere.

See [`docs/adr/0001-architecture-overview.md`](docs/adr/0001-architecture-overview.md)
and [`docs/spec/uap-1.0-wire-format.md`](docs/spec/uap-1.0-wire-format.md).

## Examples

- [`examples/01_define_tool_and_agent.py`](examples/01_define_tool_and_agent.py) — full enterprise-marked agent.
- [`examples/02_bridge_to_many_formats.py`](examples/02_bridge_to_many_formats.py) — same agent → six target formats.

## Testing

```bash
pytest -q
```

Bridge round-trip tests live under `tests/bridges/` and assert
`from_x(to_x(obj)) == obj` on the representable subset, with
`LossInfo` covering the rest.

## License

Apache 2.0 — see [LICENSE](LICENSE).

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