postbridge-core

Shared tool catalog, HTTP dispatcher, and Pydantic schema generator for PostBridge. Depended on by the framework-specific wrappers — you usually won't install this directly.

Install

pip install postbridge-core

Already installed as a dependency if you picked up postbridge-crewai, postbridge-langchain, or postbridge-llamaindex.

What's inside

Public API

from postbridge_core import (
    get_tools_raw,      # list[dict]  — raw catalog entries
    get_tool,           # dict        — single entry by name
    api_base_url,       # str         — https://api.postbridge.ai
    execute,            # callable    — run a tool against the live API
    build_args_model,   # callable    — JSON Schema → Pydantic model
    load_catalog,       # dict        — full catalog
)

Dispatching a tool call

from postbridge_core import execute
import os

os.environ["POSTBRIDGE_API_KEY"] = "pb_live_..."

# Path-param tool
status = execute("track_letter", {"letter_id": "abc-123"})

# Body-only tool
quote = execute("quote_letter", {
    "to_name": "Marie Dupont",
    "to_line1": "15 Rue de Rivoli",
    "to_city": "Paris",
    "to_postal_code": "75001",
    "to_country": "FR",
    "service": "fr_lettre_verte",
})

Building a Pydantic model for a tool

from postbridge_core import get_tool, build_args_model

send = get_tool("send_letter")
SendLetterArgs = build_args_model("send_letter", send["parameters"])

# SendLetterArgs is a full Pydantic v2 BaseModel:
args = SendLetterArgs(to_name="...", ...)

For users of the framework wrappers

You probably don't need this package directly. See instead:

• postbridge-crewai — CrewAI tools
• postbridge-langchain — LangChain and LangGraph tools
• postbridge-llamaindex — LlamaIndex tools

Each of those uses postbridge-core under the hood — same catalog, same dispatcher, same validation.

Tool catalog (as of v0.1.0)

Full developer reference: postbridge.ai/developers.html.