Routeweiler
What is Routeweiler?
Routeweiler is an open-source payment-routing client for AI platform teams that intercepts HTTP 402 responses and retries paid API calls across multiple rails. It includes Intercept 402, Enforce policy, Emit trace, and BudgetEnvelope, while keeping keys local and writing structured TraceEvent records to SQLite. The Python 3.11+ SDK supports Stripe-backed funding and routes across x402, L402, MPP-Tempo, and MPP-SPT.
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At a glance
- Routeweiler is best for AI platform teams who need to automate paid API calls without custodial billing glue.
- Yes — The page shows a Python SDK and example code for creating a Routeweiler client and calling client.get() to route payments for requests.
What does Routeweiler do?
Routeweiler handles paid API calls by intercepting a 402 response, normalizing the payment challenge, and choosing a rail that fits your policy and funding. It can enforce a declarative Policy, cap spend with BudgetEnvelope, sign the payment client-side, and retry the original request with an Authorization header. The result is a single client flow that can route across x402, L402, MPP-Tempo, and MPP-SPT without glue code. Behind the scenes, Routeweiler keeps the payment logic local: keys never leave your process, and every attempt writes a structured TraceEvent to local SQLite. It is designed for agent platforms, inference services, and finance or ops teams that need tamper-evident spend records without a hosted billing backend. Stripe is one supported funding path, and the system is built to stay non-custodial.
Why use Routeweiler?
- It routes payment challenges transparently, so agents can keep working when an endpoint changes accepted rails.
- Local SQLite trace logging gives you an audit trail without a hosted billing backend.
- One client can work across four payment rails, which lowers the cost of supporting mixed payment environments.
- Apache 2.0 licensing and a Python SDK make it easy to adopt and inspect in existing agent stacks.
Who is Routeweiler for?
- Agent platform engineers who need paid API calls to retry automatically across changing payment rails.
- Inference service teams who want to monetize requests with stablecoin micropayments.
- Finance and ops teams who need hard spend caps and tamper-evident payment traces.
- Developers building Python agents who want a plug-and-play payment client.
What are Routeweiler's key features?
plug-and-play tool
Drop in a Python 3.11+ client and call client.get() to route payment requests without building custom payment plumbing.
micropayments
Handle small-value payments through Stripe-backed routing, so agents can charge for actions without manual invoicing or batch settlement.
best payment rail
Select the best of four payment rails for each request, improving authorization success and reducing failed payment attempts.
tracks every penny
Record payment activity at fine granularity, helping teams reconcile charges and audit where each penny went across routed requests.
Intercept 402
Catch HTTP 402 payment-required responses and turn them into payment flows, so applications can recover instead of failing outright.
Enforce policy
Apply payment rules before requests proceed, using routing logic to control when and how charges are accepted.
Emit trace
Emit traces for routed payments, giving developers visibility into payment decisions and request-level behavior during debugging and audits.
What does Routeweiler integrate with?
- Stripe
What are Routeweiler's use cases?
Agent retries across payment rails
Agent platform engineers use Routeweiler to keep paid API calls moving when a payment attempt fails, using Intercept 402 and Pay and retry to automatically route the request through another rail. They can also use Route to choose the best payment rail without rebuilding their agent logic.
Micropayments for inference teams
Inference service teams use Routeweiler to monetize requests with stablecoin micropayments, using micropayments and Four payment rails to accept small payments without adding billing plumbing. One client keeps the integration simple while the service stays focused on serving requests.
Budget control for finance ops
Finance and ops teams use Routeweiler to keep spend predictable on agent traffic, using Enforce budget and under budget to set hard caps before costs drift. Tracks every penny and Emit trace give them a tamper-evident record for audits and internal reviews.
Python payment client for builders
Developers building Python agents use Routeweiler as a plug-and-play tool to add payments with minimal code, using One client and the Python 3.11+ SDK to connect quickly. They can then Enforce policy and Emit trace to keep payment behavior consistent and observable.
How does Routeweiler work?
- Install the Python 3.11+ SDK and create a Routeweiler client as your first integration step. Use One client to connect your agent or service without building payment plumbing from scratch.
- Call client.get() on paid requests and let Routeweiler Intercept 402 when a payment is required. The request can then Pay and retry automatically instead of failing outright.
- Set Enforce policy and Enforce budget to define which requests can spend and how much. Routeweiler keeps traffic under budget while routing each payment through the best payment rail.
- Turn on Emit trace to record each payment decision and keep tracks every penny visible. Review traces alongside request activity so finance, ops, and engineering can audit usage over time.
Frequently asked questions
What is Routeweiler?
Routeweiler is an open-source payment-routing client for AI platform teams that intercepts HTTP 402 responses and retries paid API calls across multiple rails. It includes Intercept 402, Enforce policy, Emit trace, and BudgetEnvelope, while keeping keys local and writing structured TraceEvent records to SQLite. The Python 3.11+ SDK supports Stripe-backed funding and routes across x402, L402, MPP-Tempo, and MPP-SPT.
What is Routeweiler used for? Who is it for?
Routeweiler is used for plug-and-play tool, micropayments, and best payment rail. It's built for Agent platform engineers, Inference service teams, and Finance and ops teams.
Does Routeweiler have an API and what does it integrate with?
The page shows a Python SDK and example code for creating a Routeweiler client and calling client.get() to route payments for requests. It integrates with Stripe.
Is Routeweiler open source or self-hostable?
Yes, Routeweiler is open source.
Editor's read
Check whether your workflow needs the Python 3.11+ SDK and local SQLite trace storage. If your stack depends on a hosted billing backend or non-Python client, Routeweiler's current setup will need extra integration work.
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