paygentic-sdk 0.1.15

Official Python SDK for the Paygentic API. Build billing, subscriptions, and usage-based monetization into your product.

paygentic-sdk

The official Python SDK for the Paygentic API — build billing, subscriptions, and usage-based monetization into your product.

Summary

Paygentic API: The Paygentic API provides billing infrastructure for usage-based and subscription monetization — customers, subscriptions, usage metering, invoicing, entitlements, and payments.

See the Quickstart to go from zero to billing in four steps.

How it works

Paygentic models your billing around five connected concepts:

Concept	What it is
Product	The service you sell (e.g., "LLM Inference Engine")
Plan	A subscribable package with pricing, billing interval, and currency
Customer	An organization you bill, connected to a Plan via a Subscription
Subscription	Ties a Customer to a Plan; activates once any upfront invoice is paid
Meter Events	Fire-and-forget events that record consumption for metered billing

Typical flow: define a Product → configure a Plan → create a Customer → create a Subscription → send Meter Events → Paygentic handles invoicing automatically.

See the Quickstart for a step-by-step walkthrough.

Table of Contents

• paygentic-sdk
  • How it works
  • SDK Installation
  • IDE Support
  • SDK Example Usage
  • Authentication
  • Available Resources and Operations
  • Retries
  • Error Handling
  • Server Selection
  • Custom HTTP Client
  • Resource Management
  • Debugging
• Development
  • Maturity
  • Contributions

SDK Installation

[!NOTE] Python version upgrade policy

Once a Python version reaches its official end of life date, a 3-month grace period is provided for users to upgrade. Following this grace period, the minimum python version supported in the SDK will be updated.

The SDK can be installed with uv, pip, or poetry package managers.

uv

uv is a fast Python package installer and resolver, designed as a drop-in replacement for pip and pip-tools. It's recommended for its speed and modern Python tooling capabilities.

uv add paygentic-sdk

PIP

PIP is the default package installer for Python, enabling easy installation and management of packages from PyPI via the command line.

pip install paygentic-sdk

Poetry

Poetry is a modern tool that simplifies dependency management and package publishing by using a single pyproject.toml file to handle project metadata and dependencies.

poetry add paygentic-sdk

Shell and script usage with uv

You can use this SDK in a Python shell with uv and the uvx command that comes with it like so:

uvx --from paygentic-sdk python

It's also possible to write a standalone Python script without needing to set up a whole project like so:

#!/usr/bin/env -S uv run --script
# /// script
# requires-python = ">=3.10"
# dependencies = [
#     "paygentic-sdk",
# ]
# ///

from paygentic_sdk import Paygentic

sdk = Paygentic(
  # SDK arguments
)

# Rest of script here...

Once that is saved to a file, you can run it with uv run script.py where script.py can be replaced with the actual file name.

IDE Support

PyCharm

Generally, the SDK will work well with most IDEs out of the box. However, when using PyCharm, you can enjoy much better integration with Pydantic by installing an additional plugin.

• PyCharm Pydantic Plugin

SDK Example Usage

Create a customer

Create a customer for each organization you bill. This is the first step in the billing setup — see the Quickstart for the full flow.

# Synchronous Example
import os
from paygentic_sdk import Paygentic


with Paygentic(
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.customers.create(merchant_id="org_YS8jkP59V71TdUvj", consumer={
        "name": "Jane Smith",
        "email": "[e-mail]",
        "address": {
            "city": "San Francisco",
            "state": "CA",
            "country": "US",
        },
    })

    # Handle response
    print(res)

The same SDK client can also be used to make asynchronous requests by importing asyncio.

# Asynchronous Example
import asyncio
import os
from paygentic_sdk import Paygentic

async def main():

    async with Paygentic(
        bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
    ) as paygentic:

        res = await paygentic.customers.create_async(merchant_id="org_YS8jkP59V71TdUvj", consumer={
            "name": "Jane Smith",
            "email": "[e-mail]",
            "address": {
                "city": "San Francisco",
                "state": "CA",
                "country": "US",
            },
        })

        # Handle response
        print(res)

asyncio.run(main())

Create a subscription

Subscribe a customer to a plan. If the plan includes in-advance charges, Paygentic generates an initial invoice and the subscription activates once paid.

# Synchronous Example
import os
from paygentic_sdk import Paygentic
from paygentic_sdk.utils import parse_datetime


with Paygentic(
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.subscriptions.create(name="Monthly API Service", plan_id="plan_abc123", started_at=parse_datetime("2024-01-15T00:00:00Z"), auto_charge=False, tax_exempt=False, customer_id="cus_abc123")

    # Handle response
    print(res)

The same SDK client can also be used to make asynchronous requests by importing asyncio.

# Asynchronous Example
import asyncio
import os
from paygentic_sdk import Paygentic
from paygentic_sdk.utils import parse_datetime

async def main():

    async with Paygentic(
        bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
    ) as paygentic:

        res = await paygentic.subscriptions.create_async(name="Monthly API Service", plan_id="plan_abc123", started_at=parse_datetime("2024-01-15T00:00:00Z"), auto_charge=False, tax_exempt=False, customer_id="cus_abc123")

        # Handle response
        print(res)

asyncio.run(main())

Report usage

Send meter events to record consumption once a subscription is active. The endpoint is fire-and-forget — it always returns 202 Accepted.

# Synchronous Example
import os
from paygentic_sdk import Paygentic


with Paygentic(
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.events.ingest(type_="ai.inference", source="https://api.myapp.com", subject="cus_abc123", data={
        "tokens": 1500,
        "model": "gpt-4o",
    })

    # Handle response
    print(res)

The same SDK client can also be used to make asynchronous requests by importing asyncio.

# Asynchronous Example
import asyncio
import os
from paygentic_sdk import Paygentic

async def main():

    async with Paygentic(
        bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
    ) as paygentic:

        res = await paygentic.events.ingest_async(type_="ai.inference", source="https://api.myapp.com", subject="cus_abc123", data={
            "tokens": 1500,
            "model": "gpt-4o",
        })

        # Handle response
        print(res)

asyncio.run(main())

Authentication

Per-Client Security Schemes

This SDK supports the following security scheme globally:

Name	Type	Scheme	Environment Variable
bearer_auth	http	HTTP Bearer	PAYGENTIC_BEARER_AUTH

To authenticate with the API the bearer_auth parameter must be set when initializing the SDK client instance. For example:

import os
from paygentic_sdk import Paygentic


with Paygentic(
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.billable_metrics.create(aggregation="SUM", description="Tracks total tokens consumed per API call", merchant_id="org_YS8jkP59V71TdUvj", name="Token Counter", product_id="prod_abc123", unit="tokens")

    # Handle response
    print(res)

Available Resources and Operations

Available methods

BillableMetrics

• create - Create
• list - List
• get - Get
• update - Update
• meter - Query Meter Usage

Customers

• list - List by Merchant
• create - Create
• get - Get
• delete - Delete
• update - Update

Disputes

• create - Create
• list - List

Entitlements

• list - List Entitlements
• issue - Issue Entitlement
• get - Get Entitlement

Entitlements.Grants

• list - List Grants
• create - Create Grant
• purchase - Purchase Grant
• get - Get Grant
• void - Void Grant

EntitlementsV0

• list_active - List by Customer
• create - Create

Events

• ingest - Ingest Event

Features

• list - List
• create - Create
• get - Get
• update - Update
• delete - Delete

Fees

• create - Create
• list - List
• get - Get
• update - Update
• delete - Delete
• get_price - Get Fee Price

InvoicesV2

• list - List
• list_line_items - List Line Items
• create_line_item - Create Manual Line Item
• get - Get
• get_line_items - Get Line Items

Payments

• list - List Payments
• create - Create Payment
• get - Get Payment

Plans

• create - Create
• list - List
• list_available - List Available Plans
• get - Get
• update - Update

Prices

• create - Create
• list - List
• get - Get
• update - Update
• delete - Delete

Products

• create - Create
• list - List
• get - Get
• update - Update

Revenue

• get - Get revenue summary

Sources

• create - Create
• list - List
• get - Get
• update - Update

Sources.Events

• list - List Events
• approve - Approve
• reject - Reject
• bulk_approve - Bulk Approve
• bulk_reject - Bulk Reject

Sources.Rules

• list - List Rules
• create - Create Rule
• get - Get Rule
• update - Update Rule
• delete - Delete Rule

Subscriptions

• list - List
• create - Create
• get - Get
• generate_portal_link - Generate Portal Link
• terminate - Terminate

TestClocks

• list - List
• create - Create
• get - Get
• advance - Advance
• delete - Delete

UsageEvents

• create - Create
• list - List
• get - Get
• refund - Refund
• batch_create - Batch Create

Users

• get - Get
• update - Update

Retries

Some of the endpoints in this SDK support retries. If you use the SDK without any configuration, it will fall back to the default retry strategy provided by the API. However, the default retry strategy can be overridden on a per-operation basis, or across the entire SDK.

To change the default retry strategy for a single API call, simply provide a RetryConfig object to the call:

import os
from paygentic_sdk import Paygentic
from paygentic_sdk.utils import BackoffStrategy, RetryConfig


with Paygentic(
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.billable_metrics.create(aggregation="SUM", description="Tracks total tokens consumed per API call", merchant_id="org_YS8jkP59V71TdUvj", name="Token Counter", product_id="prod_abc123", unit="tokens",
        RetryConfig("backoff", BackoffStrategy(1, 50, 1.1, 100), False))

    # Handle response
    print(res)

If you'd like to override the default retry strategy for all operations that support retries, you can use the retry_config optional parameter when initializing the SDK:

import os
from paygentic_sdk import Paygentic
from paygentic_sdk.utils import BackoffStrategy, RetryConfig


with Paygentic(
    retry_config=RetryConfig("backoff", BackoffStrategy(1, 50, 1.1, 100), False),
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.billable_metrics.create(aggregation="SUM", description="Tracks total tokens consumed per API call", merchant_id="org_YS8jkP59V71TdUvj", name="Token Counter", product_id="prod_abc123", unit="tokens")

    # Handle response
    print(res)

Error Handling

PaygenticError is the base class for all HTTP error responses. It has the following properties:

Property	Type	Description
err.message	str	Error message
err.status_code	int	HTTP response status code eg 404
err.headers	httpx.Headers	HTTP response headers
err.body	str	HTTP body. Can be empty string if no body is returned.
err.raw_response	httpx.Response	Raw HTTP response
err.data		Optional. Some errors may contain structured data. See Error Classes.

Example

import os
from paygentic_sdk import Paygentic, errors


with Paygentic(
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:
    res = None
    try:

        res = paygentic.billable_metrics.create(aggregation="SUM", description="Tracks total tokens consumed per API call", merchant_id="org_YS8jkP59V71TdUvj", name="Token Counter", product_id="prod_abc123", unit="tokens")

        # Handle response
        print(res)


    except errors.PaygenticError as e:
        # The base class for HTTP error responses
        print(e.message)
        print(e.status_code)
        print(e.body)
        print(e.headers)
        print(e.raw_response)

        # Depending on the method different errors may be thrown
        if isinstance(e, errors.Error):
            print(e.data.error)  # Optional[str]
            print(e.data.message)  # str
            print(e.data.details)  # Optional[Dict[str, Any]]

Error Classes

Primary errors:

• PaygenticError: The base class for HTTP error responses.
  • Error: Generic error.

Less common errors (8)

Network errors:

• httpx.RequestError: Base class for request errors.
  • httpx.ConnectError: HTTP client was unable to make a request to a server.
  • httpx.TimeoutException: HTTP request timed out.

Inherit from PaygenticError:

• ValidationError: Bad Request - The request could not be understood or was missing required parameters. Status code 400. Applicable to 56 of 88 methods.*
• DeleteCustomerConflictError: Customer cannot be deleted due to active dependencies. Status code 409. Applicable to 1 of 88 methods.*
• DeleteFeeConflictError: Fee cannot be deleted because it has associated prices. Status code 409. Applicable to 1 of 88 methods.*
• ResponseValidationError: Type mismatch between the response data and the expected Pydantic model. Provides access to the Pydantic validation error via the cause attribute.

* Check the method documentation to see if the error is applicable.

Server Selection

Override Server URL Per-Client

The default server can be overridden globally by passing a URL to the server_url: str optional parameter when initializing the SDK client instance. For example:

import os
from paygentic_sdk import Paygentic


with Paygentic(
    server_url="https://api.paygentic.io",
    bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
) as paygentic:

    res = paygentic.billable_metrics.create(aggregation="SUM", description="Tracks total tokens consumed per API call", merchant_id="org_YS8jkP59V71TdUvj", name="Token Counter", product_id="prod_abc123", unit="tokens")

    # Handle response
    print(res)

Custom HTTP Client

The Python SDK makes API calls using the httpx HTTP library. In order to provide a convenient way to configure timeouts, cookies, proxies, custom headers, and other low-level configuration, you can initialize the SDK client with your own HTTP client instance. Depending on whether you are using the sync or async version of the SDK, you can pass an instance of HttpClient or AsyncHttpClient respectively, which are Protocol's ensuring that the client has the necessary methods to make API calls. This allows you to wrap the client with your own custom logic, such as adding custom headers, logging, or error handling, or you can just pass an instance of httpx.Client or httpx.AsyncClient directly.

For example, you could specify a header for every request that this sdk makes as follows:

from paygentic_sdk import Paygentic
import httpx

http_client = httpx.Client(headers={"x-custom-header": "someValue"})
s = Paygentic(client=http_client)

or you could wrap the client with your own custom logic:

from paygentic_sdk import Paygentic
from paygentic_sdk.httpclient import AsyncHttpClient
import httpx

class CustomClient(AsyncHttpClient):
    client: AsyncHttpClient

    def __init__(self, client: AsyncHttpClient):
        self.client = client

    async def send(
        self,
        request: httpx.Request,
        *,
        stream: bool = False,
        auth: Union[
            httpx._types.AuthTypes, httpx._client.UseClientDefault, None
        ] = httpx.USE_CLIENT_DEFAULT,
        follow_redirects: Union[
            bool, httpx._client.UseClientDefault
        ] = httpx.USE_CLIENT_DEFAULT,
    ) -> httpx.Response:
        request.headers["Client-Level-Header"] = "added by client"

        return await self.client.send(
            request, stream=stream, auth=auth, follow_redirects=follow_redirects
        )

    def build_request(
        self,
        method: str,
        url: httpx._types.URLTypes,
        *,
        content: Optional[httpx._types.RequestContent] = None,
        data: Optional[httpx._types.RequestData] = None,
        files: Optional[httpx._types.RequestFiles] = None,
        json: Optional[Any] = None,
        params: Optional[httpx._types.QueryParamTypes] = None,
        headers: Optional[httpx._types.HeaderTypes] = None,
        cookies: Optional[httpx._types.CookieTypes] = None,
        timeout: Union[
            httpx._types.TimeoutTypes, httpx._client.UseClientDefault
        ] = httpx.USE_CLIENT_DEFAULT,
        extensions: Optional[httpx._types.RequestExtensions] = None,
    ) -> httpx.Request:
        return self.client.build_request(
            method,
            url,
            content=content,
            data=data,
            files=files,
            json=json,
            params=params,
            headers=headers,
            cookies=cookies,
            timeout=timeout,
            extensions=extensions,
        )

s = Paygentic(async_client=CustomClient(httpx.AsyncClient()))

Resource Management

The Paygentic class implements the context manager protocol and registers a finalizer function to close the underlying sync and async HTTPX clients it uses under the hood. This will close HTTP connections, release memory and free up other resources held by the SDK. In short-lived Python programs and notebooks that make a few SDK method calls, resource management may not be a concern. However, in longer-lived programs, it is beneficial to create a single SDK instance via a context manager and reuse it across the application.

import os
from paygentic_sdk import Paygentic
def main():

    with Paygentic(
        bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
    ) as paygentic:
        # Rest of application here...


# Or when using async:
async def amain():

    async with Paygentic(
        bearer_auth=os.getenv("PAYGENTIC_BEARER_AUTH", ""),
    ) as paygentic:
        # Rest of application here...

Debugging

You can setup your SDK to emit debug logs for SDK requests and responses.

You can pass your own logger class directly into your SDK.

from paygentic_sdk import Paygentic
import logging

logging.basicConfig(level=logging.DEBUG)
s = Paygentic(debug_logger=logging.getLogger("paygentic_sdk"))

You can also enable a default debug logger by setting an environment variable PAYGENTIC_DEBUG to true.

Development

Maturity

This SDK is generally available. We follow semantic versioning — breaking changes will only occur in major version bumps. We recommend pinning to a specific minor version in production.

Contributions

While we value open-source contributions to this SDK, this library is generated programmatically. Any manual changes added to internal files will be overwritten on the next generation. We look forward to hearing your feedback. Feel free to open a PR or an issue with a proof of concept and we'll do our best to include it in a future release.

SDK Created by Speakeasy