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Circuit & Chisel

Also known as: ATXP

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Entry priceFree account; pay as you go per model and tool call from a pre funded balance, $5 starting credit for a self registered agentFull pricing detail

ATXP gives AI agents their own funded accounts, with a wallet, an email address, an OpenAI compatible model gateway and pay per call tools, and lets developers charge agents per call from their own MCP servers.

Circuit & Chisel builds ATXP, which gives AI agents their own accounts to pay for what they use. An agent can register itself with one command and receives a funded account with $5 in credits, an Ethereum wallet, an email address and a connection token.

With it the agent calls an OpenAI compatible model gateway that serves GPT, Claude, Gemini, Llama, Qwen and other models, and a catalog of pay per call tools: web search and crawl, X search, a filestore, image, music and video generation, sandboxed code, contact lookup, x402 payments, and email it sends and receives from its own address. Credits are pre funded, which caps what an agent can spend, and developers can add an approval check before each payment. Developers can also put their own MCP servers behind per call payment and charge agents directly.

ATXP is hosted, self serve and billed per call, with SDKs, a CLI and guides for common agent frameworks. It has no workflow engine, security attestation or deployment options of its own. The company, founded by former Stripe leaders, now describes itself as a frontier AI lab and leads with Unbiased, a separate platform for its Pareto model; ATXP continues at atxp.ai. This profile and its grid grade ATXP alone; Unbiased is sold beside it and is not graded here.

Circuit & Chisel raised a nineteen point two million dollar seed round co-led by Primary Venture Partners and ParaFi Capital in September 2025.

Vendor details

Canonical URL

https://atxp.ai

Category

Agent infrastructure

Subcategory

Agent accounts and payments

Funding status

Seed; nineteen point two million dollars co-led by Primary Venture Partners and ParaFi Capital with Stripe, Coinbase Ventures, Solana Ventures, Samsung Next and Polygon Labs, September 2025.

Company status

independent

Use cases & customers

Primary use cases

Giving an agent its own funded account, wallet and emailPaying per call for model inference and tools without API keys per providerCharging agents per call from your own MCP serverCapping agent spend with pre funded credits

Target customers

AI agent developersDevelopers monetizing MCP serversBuilders of autonomous agents

Deployment options

Hosted service (ATXP gateway, tools and accounts)

Integrations

ATXP gives each agent an account with a wallet, an email address and a connection token; a catalog of pay per call MCP tools (search, crawl, X search, filestore, image, music, video, code, email, contact, x402); an OpenAI compatible LLM gateway; SDKs, a CLI and an ATXP Skill; and a way for developers to charge agents per call from their own MCP servers. Guides cover Vercel AI, Cloudflare Agents, LangChain, CrewAI, the OpenAI Agents SDK and Claude Code.

In practice

A developer's agent registers its own ATXP account, then pays per call for web search, an image and a model call from its $5 starting credit without any provider API keys

A data provider wraps its MCP server with ATXP and charges each agent a cent per tool call

A team funds an agent's account with a fixed amount so it cannot spend beyond it, and approves larger payments in code before they go through

Agentic Index coverage score

4.5 / 14 capabilities · 32%

Integrations & Tool Calling Full

A named tool catalog plus a custom route. ATXP's catalog of pay per call MCP servers gives an agent web search, crawl, X live search, a filestore, image, music and video generation, sandboxed code execution, contact lookup, x402 payments and email it sends and receives from its own address; the ATXP client can call any ATXP enabled MCP server, and developers can put their own MCP servers behind per call payment.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Tools, Email, Monetize MCP Tools, @atxp/client)read 2026-09-25

Workflow Orchestration Not documented

No workflow model. ATXP gives an agent an account, a wallet, a model gateway and paid tools; the agent's own framework (the docs show Vercel AI, Cloudflare Agents, LangChain, CrewAI and the OpenAI Agents SDK) decides the steps. The payment lifecycle it manages is not multi step agent execution.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Build Agents, SDK overview)read 2026-09-25

Knowledge Grounding & RAG Not documented

No retrieval structure over the customer's knowledge. The search, crawl and X search tools query the public web, not the customer's corpus, and the filestore is file storage without indexing or retrieval.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Tools)read 2026-09-25

Human Oversight & Guardrails Partial

Spend constraints and an approval hook, no approval surface of ATXP's own. Pre funded credits (IOU tokens) set a structural ceiling on what an agent can spend, and the ATXP client takes an approvePayment callback that runs before each payment, which the developer can use to auto approve small amounts and send larger ones for confirmation. The confirmation step itself is the developer's code.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (@atxp/client) and atxp.ai/llms.txt (IOU tokens and spending limits)read 2026-09-25

Security, Identity & Governance Not documented

No access model and no compliance posture. Each agent gets its own account with a connection token, a wallet and an email address, which isolates credentials per agent but documents nothing about who inside the customer's organization can do what: no roles, SSO or permissions for the account portal. No attestation or trust page is published. Per agent accounts and connection tokens are agent identity, not an access surface for people.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Agent quickstart, CLI, troubleshooting)read 2026-09-25

Observability & Auditability Partial

Transaction history, not a run trace. npx atxp transactions lists an account's recent payments, the account portal shows usage and balance, and the client's onPayment and onPaymentFailure callbacks let a developer record each payment. That reports what was paid for, one payment at a time; nothing shows an agent's steps or tool calls as a run.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (CLI, @atxp/client, Account Portal)read 2026-09-25

Memory & State Persistence Partial

A store the agent keeps across sessions, not a memory layer. The Filestore MCP server lets an agent store, retrieve and delete files under its own account, and its inbox keeps mail it can read later, so an agent can carry material from one session to the next. No scope, lifetime or review surface is stated, and the filestore is plain storage the agent reads.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Filestore, Email)read 2026-09-25

Deployment & Data Residency Not documented

Hosted only, with no region or customer environment named. ATXP's gateway (llm.atxp.ai), tools and accounts run as ATXP's hosted service. The Redis and SQLite packages store OAuth tokens for a developer's own paid MCP server, which is the developer's deployment, not ATXP's.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (@atxp/redis, @atxp/sqlite, LLM Gateway)read 2026-09-25

Prebuilt Agents, Templates & Packs Not documented

No prebuilt agents or templates are offered for a buyer to adopt. The ATXP Skill gives an existing agent access to the paid tools, a tool bundle rather than an agent. The consumer apps atxp.chat, atxp.music and atxp.pics are built for people, and clowd.bot (beta) hosts OpenClaw, an open source runtime ATXP did not build.

SourceATXP by Circuit & Chisel, atxp.ai and docs.atxp.ai llms-full.txt (ATXP Skill)read 2026-09-25

Triggers & Channel Coverage Not documented

Work reaches ATXP only when the agent calls the gateway or a tool. Each agent has an inbox at its own address, but the docs show the agent checking it on request; no event, webhook or schedule starts the agent when mail arrives.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Email, CLI)read 2026-09-25

Model Flexibility & Routing Full

The caller chooses the model. ATXP's LLM Gateway at llm.atxp.ai/v1 is OpenAI compatible and serves GPT, Claude, Gemini, Llama, Qwen and other models from a published catalog with per token pricing; the model is named on each request, and desktop apps such as Goose use it as a provider.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (LLM Gateway, Available models and pricing, Use the LLM Gateway in apps)read 2026-09-25

APIs, SDKs & MCP Extensibility Full

Documented SDKs and a CLI for ATXP itself. The API reference covers @atxp/client, server, express, base, common, redis, sqlite and solana packages; the CLI registers and funds agents, checks balances, lists transactions and calls tools; the gateway is an OpenAI compatible HTTP endpoint; and the docs are served as an MCP server. SDKs and reference servers are published at github.com/atxp-dev.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (API Reference, CLI) and docs.atxp.ai/llms.txtread 2026-09-25

Testing, Debugging & Optimization Not documented

No evaluation surface for agents. ATXP documents accounts, payments, a gateway and tools; nothing tests or scores agent output. The company's Pareto benchmark harness on GitHub belongs to Unbiased, its separate model product, and a vendor's benchmark of its own model is marketing either way.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt and circuitandchisel.comread 2026-09-25

Browser & Computer Use Not documented

No agent operates a browser or desktop. The Crawl tool fetches web pages as one of the paid tools, and the code tool runs code in a sandbox.

SourceATXP by Circuit & Chisel, docs.atxp.ai llms-full.txt (Crawl, Code)read 2026-09-25

The Agentic Index coverage score grades every vendor Full, Partial or Not documented against the same 14 buyer facing capabilities, from public evidence only. Each capability links to how all vendors in the index score on it. How this evidence is graded

Pricing

Free account; pay as you go per model and tool call from a pre funded balance, $5 starting credit for a self registered agent

believed transaction or settlement fees on agent payments (not disclosed)

What is public

Per model token prices on the gateway, per operation tool prices, the free account and the $5 starting credit.

Billing mechanics

Pre funded credits (IOU tokens) topped up by card link or crypto deposit and drawn down per call; per token pricing on the LLM Gateway and per operation pricing on tools.

Cost watchouts

Every tool call and token is charged from the balance, so spend follows how much an agent searches, generates and calls models; a developer's own paid MCP server sets its own per call price.

Variable cost rationale

Purely per call and per token from a prepaid balance; the pre funded ceiling bounds spend but nothing is flat.

Additional watchouts

Circuit & Chisel now leads with Unbiased, a separate model platform; ATXP's own pricing is per call only.

Sales call required

No, self serve available

Free / trial

Free to create; $5 in starting credits when an agent self registers

Key ambiguities

Rates are published per model and per tool operation rather than as plans, so an agent's cost depends entirely on its mix of calls.

Missing data

Any volume or enterprise terms.

Agentic Index verified 2026-09-25

Alternatives to Circuit & Chisel

The closest documented capability profiles to Circuit & Chisel among agent infrastructure platforms tracked by Agentic Index, ordered by similarity on the same 14 point evidence the rankings use. No vendor pays for placement.

  • AIsa6.0 / 14Adds documented Security, Identity & Governance and Deployment & Data Residency, among others
  • Vocode6.0 / 14Adds documented Workflow Orchestration and Deployment & Data Residency, among others
  • Clawvisor6.5 / 14Adds documented Security, Identity & Governance and Deployment & Data Residency
  • Deepgram7.5 / 14Adds documented Workflow Orchestration and Security, Identity & Governance, among others
  • Dome Systems6.5 / 14Adds documented Security, Identity & Governance and Testing, Debugging & Optimization
  • Nevermined4.5 / 14Adds documented Security, Identity & Governance

Similarity is computed from each vendor's Agentic Index coverage score evidence, axis by axis, not from the totals. How this evidence is graded

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