Is QBT Labs a Dexter.cash alternative?

QBT Labs ships open-source AI agent payment infrastructure — x402-compatible payments, AMP-style channels, encrypted vault and signer isolation, and a spend policy engine. Teams that want to self-host the payment path or integrate it into an existing product use QBT Labs instead of, or alongside, a hosted product.

Does QBT Labs replace Dexter.cash?

QBT Labs replaces the underlying payment, settlement, receipts, and policy stack for teams that want to run it themselves. Teams that prefer a hosted product may still choose Dexter.cash; teams that want open-source primitives, control of the signer, and the ability to plug their own chains and facilitators typically choose QBT Labs.

Can QBT Labs be used inside an existing agent payments product?

Yes. @qbtlabs/x402, the AMP channel layer, vault, and policy engine are MIT-licensed and designed to be embedded into existing platforms, marketplaces, or agent runtimes.

What does QBT Labs add beyond a payment SDK?

An encrypted vault and process-isolated signer over a Unix socket, per-agent budgets and recipient allowlists, audit logs, structured receipts, and multi-chain verification across Base, Solana, and Cardano.

Comparison guide

QBT Labs as a Dexter.cash alternative for AI agent payments

Teams evaluating AI agent payment products often look for an open-source path: code they can read, a signer they control, policies that satisfy compliance, and the ability to bring their own facilitator and chains. QBT Labs ships that stack: x402-compatible payments, AMP-style channels, encrypted vault, signer isolation, and a spend policy engine.

Capability

QBT Labs

Dexter.cash (as referenced by users)

Delivery model

MIT-licensed open-source SDKs that teams self-host

Hosted agent payments product

Per-call payments

x402-compatible HTTP 402 flow via @qbtlabs/x402

Product-managed payment rails

High-volume sessions

AMP-style payment channels for repeated calls

Product-mediated metering

Signer model

Encrypted vault with process-isolated signer

Hosted / custodial signer

Spend policy

Per-agent caps, daily limits, recipient allowlists, chain restrictions

Product configuration

Receipts

Per-call receipt with request ID, amount, asset, chain, recipient, status

Product reporting

Chains

Base, Solana, Cardano; pluggable

Defined by the product

Facilitator

Bring your own facilitator

Product-managed

Code access

Source, packages, and integration patterns are open

Product API surface

Own the signer

Raw private keys never touch agent memory. The signer runs in a separate process behind a Unix socket, with an encrypted vault and policy checks at every signature.

Policy-first spend

Set per-agent caps, daily limits, recipient allowlists, and chain restrictions. Wallets without policy are dangerous; policy is what makes autonomous payment safe in production.

x402 plus channels

Start per-request with x402 for paid APIs and MCP tools. Move heavy sessions to AMP-style channels that deposit once and settle periodically.

When QBT Labs is the better fit

You want open-source code, not just a hosted dashboard.
You need a non-custodial signer with policy checks at every call.
You need to plug in your own facilitator or chain.
You are monetizing your own APIs or MCP tools for autonomous agents.
You need receipts and audit logs that map to billing and compliance.
You are embedding payments into a larger agent platform you operate.

Run agent payments on infrastructure you control

QBT Labs gives you the open-source primitives — x402, AMP-style channels, encrypted vault, signer isolation, policy, and receipts — that production autonomous payments need.

See the AI payment stack What QBT Labs does for autonomous agents

Nevermined alternative x402 payment infrastructure Pricing patterns