tollgateai 0.8.0

Track LLM model usage and compute live gross margin with Tollgate.

tollgateai

Real-time gross-margin observability for AI-powered products.
Track every LLM call's cost, attribute it to a customer, and know whether you're making money — before the invoice goes out.

Dashboard · TypeScript SDK · Quick Start · API Reference

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Why Tollgate?

AI products bill customers on plans (per ticket, per seat, usage-based) but pay providers per token. Tollgate joins the two in real time — giving you per-customer, per-agent, per-run gross margin the moment each LLM call completes.

• 2-line integration — wrap your provider client once; every call is tracked automatically.
• Zero dependencies — uses only urllib and threading from the Python standard library.
• Non-blocking — usage reporting fires on a daemon thread. Failures never raise into your application code.
• Privacy-first — no prompt content is ever transmitted. Only token counts, model identifiers, and metadata.
• Universal coverage — Anthropic, OpenAI, Google Gemini, AWS Bedrock, and every OpenAI-compatible gateway.

┌──────────────┐    ┌───────────────┐    ┌────────────────┐
│  Your App    │───▶│ LLM Provider  │───▶│   Provider     │
│  (SDK wrap)  │◀──│ (Anthropic,   │◀──│   Response     │
│              │    │  OpenAI, …)   │    │  (tokens, id)  │
└──────┬───────┘    └───────────────┘    └────────────────┘
       │
       │  POST /api/track (background daemon thread)
       ▼
┌─────────────────────────────────────────────────────┐
│  Tollgate Server                                    │
│                                                     │
│  ┌─────────────┐ ┌───────────┐ ┌─────────────────┐ │
│  │ Rate Card   │ │ Plan      │ │ Margin Rollups  │ │
│  │ (1,500+     │ │ Revenue   │ │ (per customer,  │ │
│  │  models)    │ │ Config    │ │  agent, run)    │ │
│  └─────────────┘ └───────────┘ └─────────────────┘ │
└─────────────────────────────────────────────────────┘

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Installation

pip install tollgateai

Requirements: Python 3.8+ · Zero dependencies · Standard library only (urllib, threading)

---

Quick Start

from anthropic import Anthropic
from tollgate import create_tollgate_client, wrap_anthropic

tollgate = create_tollgate_client()          # reads TOLLGATE_API_KEY from env
anthropic = wrap_anthropic(
    Anthropic(), tollgate,
    customer_id="cust_acme",
    run_id="ticket_8842",
)

# Every call is tracked automatically — tokens, cost, latency, tool calls.
msg = anthropic.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Resolve this billing dispute..."}],
)

# Close the run and book revenue.
tollgate.resolve(
    run_id="ticket_8842",
    customer_id="cust_acme",
    outcome="resolved",
    revenue_unit_cents=50,       # $0.50 per resolved ticket
)

---

Provider Support

Provider	Wrapper	Streaming	Extracted Fields
Anthropic	wrap_anthropic	Automatic	Input/output tokens, cache read/write, web search requests, tool calls, latency
OpenAI	wrap_openai	stream_options={"include_usage": True}	Input/output tokens, reasoning, cached, audio in/out, text in/out, prediction tokens, service tier, tool calls, latency
Google Gemini	wrap_gemini	Automatic	Input/output tokens, thinking, cached, audio/image/video per-modality, web search (grounding), tool calls, latency
OpenAI-compatible	wrap_openai + provider="openai_compatible"	Same as OpenAI	Same as OpenAI + gateway-reported cost (when available)
AWS Bedrock	wrap_bedrock	Automatic	Input/output tokens, cache read/write (per-TTL split), tool calls, latency

---

Configuration

Environment Variables

Variable	Required	Default	Description
TOLLGATE_API_KEY	Yes	—	Your account API key (tg_live_…)
TOLLGATE_BASE_URL	No	https://www.tollgateai.dev	Self-hosted deployment URL

Programmatic Configuration

tollgate = create_tollgate_client(
    api_key="tg_live_xxx",
    base_url="https://www.tollgateai.dev",
    timeout=10.0,       # per-request timeout in seconds (default 10)
    max_retries=2,      # retries on 5xx/429/network (default 2)
)

---

Auto-Instrumentation

Wrap your provider client once. Every create / generate_content / converse call reports usage on a background daemon thread — non-blocking, fire-and-forget. Failures go to on_error (default: logger.warning) and never raise into your application code.

Anthropic

from anthropic import Anthropic
from tollgate import create_tollgate_client, wrap_anthropic

tollgate = create_tollgate_client()
anthropic = wrap_anthropic(
    Anthropic(), tollgate,
    customer_id="cust_acme",
    run_id="ticket_8842",
)

anthropic.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=512,
    messages=[{"role": "user", "content": "Summarize this ticket..."}],
)

OpenAI

from openai import OpenAI
from tollgate import create_tollgate_client, wrap_openai

tollgate = create_tollgate_client()
openai = wrap_openai(OpenAI(), tollgate, customer_id="cust_acme")

openai.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hello"}],
)

Google Gemini

import google.generativeai as genai
from tollgate import create_tollgate_client, wrap_gemini

genai.configure(api_key=GEMINI_API_KEY)
tollgate = create_tollgate_client()
model = wrap_gemini(
    genai.GenerativeModel("gemini-2.0-flash"),
    tollgate,
    customer_id="cust_acme",
)

response = model.generate_content("Explain quantum computing")

OpenAI-Compatible Gateways

Works with any OpenAI-compatible endpoint — OpenRouter, Groq, Together, Nebius, Vercel AI Gateway, local vLLM, and more.

from openai import OpenAI
from tollgate import create_tollgate_client, wrap_openai

tollgate = create_tollgate_client()
groq = wrap_openai(
    OpenAI(api_key=GROQ_KEY, base_url="https://api.groq.com/openai/v1"),
    tollgate,
    customer_id="cust_acme",
    provider="openai_compatible",
)

groq.chat.completions.create(
    model="llama-3.3-70b-versatile",
    messages=[{"role": "user", "content": "Hello"}],
)

When a gateway returns cost inline (e.g. OpenRouter's usage.cost), the SDK captures it automatically as providerCostCents. The server uses it verbatim, bypassing the rate card. Gateways that don't return cost fall through to rate-card pricing. An explicit provider_cost_cents in the wrapper options always takes precedence.

AWS Bedrock

import boto3
from tollgate import create_tollgate_client, wrap_bedrock

tollgate = create_tollgate_client()
bedrock = wrap_bedrock(
    boto3.client("bedrock-runtime", region_name="us-east-1"),
    tollgate,
    customer_id="cust_acme",
)

bedrock.converse(
    modelId="anthropic.claude-3-5-sonnet-20241022-v2:0",
    messages=[{"role": "user", "content": [{"text": "Hello"}]}],
)

Streaming

Streaming is captured automatically. Iterate the stream as usual — usage and latency are reported when the stream ends.

OpenAI / compatible requires stream_options={"include_usage": True}. Anthropic, Gemini, and Bedrock need no extra flags.

stream = openai.chat.completions.create(
    model="gpt-4o",
    stream=True,
    stream_options={"include_usage": True},
    messages=[{"role": "user", "content": "Hello"}],
)
for chunk in stream:
    pass  # render to UI
# Usage + latency reported automatically when stream ends.

---

Tracked Fields

Every auto-instrumented call captures these fields from the provider response:

Field	Providers	Description
tokensIn	All	Input tokens (deduplicated — excludes cached/audio for OpenAI; excludes cached/audio/image/video for Gemini)
tokensOut	All	Output tokens (deduplicated — excludes reasoning/audio for OpenAI; excludes audio/image for Gemini)
reasoningTokens	OpenAI, Gemini	Reasoning/thinking tokens (billed at reasoning rate)
cachedTokens	All	Prompt cache read tokens (reduced rate)
cacheWrite5mTokens	Anthropic, Bedrock	Cache creation tokens (5-minute TTL)
cacheWrite1hTokens	Bedrock	Cache creation tokens (1-hour TTL)
audioTokensIn / Out	OpenAI, Gemini	Audio modality tokens (GPT-4o audio, Gemini multimodal)
imageTokensIn / Out	Gemini	Image/vision input and generation output tokens
videoTokensIn	Gemini	Video input tokens
textTokensIn / Out	OpenAI, Gemini	Text-only modality tokens
webSearchRequests	Anthropic, Gemini	Web search requests (server tools / grounding)
acceptedPredictionTokens	OpenAI	Predicted Outputs: accepted tokens
rejectedPredictionTokens	OpenAI	Predicted Outputs: rejected (waste) tokens
serviceTier	OpenAI	Service tier (default, flex, priority)
latencyMs	All	SDK-measured request duration in milliseconds
toolCalls	All	Number of tool calls in the response
providerCostCents	OpenAI-compatible	Gateway-reported cost — used verbatim, bypasses rate card
model	All	Model identifier as reported by the provider

Cost is computed server-side from token counts and a rate card that auto-syncs daily from the LiteLLM registry (1,500+ models). Rate cards include per-token pricing for every modality, cache tier, reasoning, and web search. Unknown models are priced at $0 and flagged in logs.

---

Provider Field Coverage

Anthropic — Messages API

Anthropic API Field	SDK Field	Notes
usage.input_tokens	tokensIn	Input tokens (excludes cached)
usage.output_tokens	tokensOut	Output tokens (includes reasoning — billed at output rate)
usage.cache_read_input_tokens	cachedTokens	Prompt cache read tokens
usage.cache_creation_input_tokens	cacheWrite5mTokens	Prompt cache creation tokens
usage.server_tool_use.web_search_requests	webSearchRequests	Web search server tool requests
response.content[] (type tool_use)	toolCalls	Count of tool-use content blocks
(SDK-measured)	latencyMs	Request duration

Anthropic bills reasoning tokens at the output rate. The SDK reports the full output_tokens count; the server-side rate card applies the matching output rate.

In streaming mode, message_start carries input/cache counts and message_delta carries the output count. The SDK accumulates both automatically.

OpenAI — Chat Completions API

OpenAI API Field	SDK Field	Notes
usage.prompt_tokens	tokensIn	Minus cached and audio tokens to prevent double-billing
usage.completion_tokens	tokensOut	Minus reasoning and audio tokens to prevent double-billing
usage.completion_tokens_details.reasoning_tokens	reasoningTokens	Reasoning/thinking tokens
usage.prompt_tokens_details.cached_tokens	cachedTokens	Prompt cache read tokens
usage.prompt_tokens_details.audio_tokens	audioTokensIn	Audio input tokens
usage.completion_tokens_details.audio_tokens	audioTokensOut	Audio output tokens
usage.prompt_tokens_details.text_tokens	textTokensIn	Text modality input tokens
usage.completion_tokens_details.text_tokens	textTokensOut	Text modality output tokens
usage.completion_tokens_details.accepted_prediction_tokens	acceptedPredictionTokens	Predicted Outputs: accepted
usage.completion_tokens_details.rejected_prediction_tokens	rejectedPredictionTokens	Predicted Outputs: rejected
service_tier	serviceTier	Service tier used
choices[].message.tool_calls	toolCalls	Tool call count
(SDK-measured)	latencyMs	Request duration

OpenAI's prompt_tokens and completion_tokens are totals that include sub-category tokens. The SDK subtracts each sub-category so every token is costed at exactly one rate.

Google Gemini — Generative AI / Vertex AI

Google API Field	SDK Field	Notes
usageMetadata.promptTokenCount	tokensIn	Minus cached, audio, image, video to prevent double-billing
usageMetadata.candidatesTokenCount	tokensOut	Minus audio and image output (thinking is already excluded by Google)
usageMetadata.thoughtsTokenCount	reasoningTokens	Thinking/reasoning tokens (Gemini 2.x)
usageMetadata.cachedContentTokenCount	cachedTokens	Prompt cache read tokens
promptTokensDetails[AUDIO]	audioTokensIn	Audio input modality
candidatesTokensDetails[AUDIO]	audioTokensOut	Audio output modality
promptTokensDetails[IMAGE]	imageTokensIn	Image/vision input
candidatesTokensDetails[IMAGE]	imageTokensOut	Image generation output
promptTokensDetails[VIDEO]	videoTokensIn	Video input
promptTokensDetails[TEXT]	textTokensIn	Text input
candidatesTokensDetails[TEXT]	textTokensOut	Text output
candidates[].groundingMetadata.webSearchQueries	webSearchRequests	Google Search grounding
candidates[].content.parts[].functionCall	toolCalls	Function call count
(SDK-measured)	latencyMs	Request duration

Google's candidatesTokenCount does not include thoughtsTokenCount, so reasoning tokens are not subtracted. However, it does include audio and image output tokens, so the SDK subtracts those to prevent double-billing.

The Python SDK handles both snake_case (usage_metadata, prompt_token_count) and camelCase (usageMetadata, promptTokenCount) response formats — compatible with both the official google-generativeai SDK and the REST API.

AWS Bedrock — Converse API

Bedrock API Field	SDK Field	Notes
usage.inputTokens	tokensIn	Input tokens
usage.outputTokens	tokensOut	Output tokens (includes reasoning — Bedrock does not split)
usage.cacheReadInputTokens	cachedTokens	Prompt cache read tokens
usage.cacheDetails[ttl="5m"]	cacheWrite5mTokens	Cache creation (5-minute TTL)
usage.cacheDetails[ttl="1h"]	cacheWrite1hTokens	Cache creation (1-hour TTL, higher rate)
output.message.content[].toolUse	toolCalls	Tool-use content block count
(SDK-measured)	latencyMs	Request duration

Bedrock's cacheDetails array provides per-TTL breakdowns. The SDK splits these into cacheWrite5mTokens and cacheWrite1hTokens. When cacheDetails is absent, cacheWriteInputTokens falls back to the 5m bucket.

In streaming mode (converse_stream), the final metadata event carries usage totals. Tool calls are accumulated from contentBlockStart events.

---

Pricing Models

Per-Call Revenue

For simple per-call billing, pass revenue_unit_cents in the wrapper options:

anthropic = wrap_anthropic(
    Anthropic(), tollgate,
    customer_id="cust_acme",
    revenue_unit_cents=50,  # $0.50 earned per LLM call
)

Outcome-Based Pricing

Under per-resolution pricing, only a resolved run earns revenue. Escalated or failed runs earn $0, but provider costs still count against margin.

run_id = "ticket_8842"
anthropic = wrap_anthropic(
    Anthropic(), tollgate,
    customer_id="cust_acme",
    run_id=run_id,
)

# ... multiple LLM calls within this run ...

tollgate.resolve(
    run_id=run_id,
    customer_id="cust_acme",
    outcome="resolved",        # "resolved" | "escalated" | "failed"
    revenue_unit_cents=50,
)

External Tool Costs

Report costs from non-LLM services (image generation, code sandboxes, search APIs) alongside LLM calls:

tollgate.track({
    "customerId": "cust_acme",
    "runId": "ticket_8842",
    "provider": "openai",
    "model": "dall-e-3",
    "tokensIn": 0,
    "tokensOut": 0,
    "externalCostCents": 4.0,     # $0.04 for the DALL-E call
    "idempotencyKey": "ticket_8842#dalle",
})

---

Customer & Plan Setup

Create customers and assign plans before sending usage so plan-priced revenue is recognized from the first event. Idempotent — safe to call on every app boot.

tollgate.upsert_customer(
    "cust_acme",
    name="Acme Corp",
    plan={
        "name": "Pro Plan",
        "pricingModel": "usage_based",   # per_unit | per_resolution | usage_based | per_seat | flat | hybrid
        "unitRevenueCents": 10,
    },
)

---

Error Handling

The SDK separates tracking errors (non-fatal) from client errors (actionable):

import logging
from tollgate import create_tollgate_client, wrap_anthropic, TollgateError

# Tracking errors are logged as warnings by default.
# Override with on_error to route to your observability stack:
anthropic = wrap_anthropic(
    Anthropic(), tollgate,
    customer_id="cust_acme",
    on_error=lambda err: sentry_sdk.capture_exception(err),
)

# Client errors (missing API key, invalid plan) raise TollgateError:
try:
    tollgate.upsert_customer("cust_acme")
except TollgateError as err:
    print(err.status, err.body)  # HTTP status + response body

Retry behavior: The client retries on 5xx and 429 responses with exponential backoff (200ms, 400ms, ...). Deterministic 4xx errors (400, 401, 403, 404, 422) fail immediately.

Logging: The SDK uses the standard logging module under the "tollgate" logger name. Configure it as you would any Python logger:

logging.getLogger("tollgate").setLevel(logging.DEBUG)

---

API Reference

Exports

# Client
create_tollgate_client(api_key?, base_url?, timeout?, max_retries?)  # -> TollgateClient
TollgateError                    # Exception with status & body

# Auto-instrumentation wrappers
wrap_anthropic(client, tollgate, customer_id, **kwargs)   # -> instrumented Anthropic client
wrap_openai(client, tollgate, customer_id, **kwargs)      # -> instrumented OpenAI / compatible client
wrap_bedrock(client, tollgate, customer_id, **kwargs)     # -> instrumented Bedrock client
wrap_gemini(model, tollgate, customer_id, **kwargs)       # -> instrumented Gemini model

# Low-level event builders (for manual track payloads)
anthropic_event_from(msg, customer_id, **kwargs)          # -> dict | None
openai_event_from(completion, customer_id, **kwargs)      # -> dict | None
bedrock_event_from(usage, model, customer_id, **kwargs)   # -> dict | None
gemini_event_from(response, customer_id, **kwargs)        # -> dict | None

TollgateClient

Method	Description
track(event: dict)	Report a single usage event. Idempotent on idempotencyKey. Returns {"status", "eventId"}.
resolve(run_id, customer_id, outcome, ...)	Close a run with an outcome. Books revenue only when outcome == "resolved".
upsert_customer(customer_id, ...)	Create or update a customer and optionally assign a plan. Returns {"status", "customerId", "id", "planId"}.

create_tollgate_client Parameters

Parameter	Type	Default	Description
api_key	str	TOLLGATE_API_KEY env	Account API key
base_url	str	https://www.tollgateai.dev	Tollgate server URL
timeout	float	10.0	Per-request timeout in seconds
max_retries	int	2	Retry attempts on 5xx / 429 / network errors

Wrapper Parameters

Parameter	Type	Required	Description
customer_id	str	Yes	Your end customer's stable identifier
agent_id	str	No	Agent or workflow identifier
run_id	str | Callable	No	Logical run ID (defaults to provider response ID)
provider	str	No	Override the reported provider
revenue_unit_cents	int | Callable	No	Revenue per call in cents
provider_cost_cents	float | Callable	No	Exact cost override in cents (skips rate card)
on_error	Callable	No	Error handler for background tracking (default: logger.warning)

---

How It Works

1. Proxy wrappers intercept provider calls without modifying the request or response. Your code sees the exact same types and behavior as without the SDK.
2. After the provider responds, the wrapper extracts token counts by modality, tool calls, service tier, and latency from the response object.
3. A POST /api/track fires on a background daemon thread with automatic retries on transient failures. Your application code continues immediately.
4. The server computes cost from tokens via rate cards (per modality, cache tier, reasoning, and web search), joins it with plan-configured revenue, and updates real-time margin rollups.
5. Events are idempotent — deduplication is based on idempotencyKey (auto-set to the provider response ID).

Security & Privacy

• No prompt content is ever transmitted. Only token counts, model identifiers, and metadata.
• Idempotent ingestion — duplicate events are safely deduplicated server-side.
• Non-invasive — background tracking never raises into your application code.
• Transport security — all communication over HTTPS with Bearer token authentication.
• Thread-safe — all wrappers and the client are safe for concurrent use.

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Changelog

v0.8.0

• Base URL now points to https://www.tollgateai.dev for all SDK requests
• Confirmed zero-dependency footprint across all providers (Anthropic, OpenAI, Bedrock, Gemini)

v0.7.0

• Google Gemini: fixed double-billing of multimodal input tokens — tokensIn now subtracts cached, audio, image, and video tokens
• Aligned Anthropic extraction with actual API response fields
• Simplified Anthropic streaming accumulation
• Verified field coverage for all five providers

v0.6.0

• OpenAI: fixed double-counting of reasoning, audio, and cached tokens
• Multimodal-only events now trigger rate-card lookup
• Reasoning token extraction for OpenAI and Gemini

v0.5.0

• Google Gemini / Vertex AI support with full multimodal extraction
• Audio, image, video, and text modality token tracking
• Web search request tracking (Anthropic, Gemini)
• OpenAI Predicted Outputs and service tier tracking
• Latency measurement on all wrappers

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License

MIT — see LICENSE for details.