# Agent Capital

> Neutral, source-backed reference and free browser tools for how autonomous AI agents hold, move, limit, budget, and account for money.

Primary URL: [agentcapital.io](https://agentcapital.io/)
Updated: 2026-07-06
Audience: builders, risk owners, finance operators, product teams, and researchers studying agent wallets, spend controls, agentic payments, and agent treasury.

## Core pages

- [Landscape](https://agentcapital.io/) - landscape map and verdict
- [Tools](https://agentcapital.io/tools) - free client-side agent finance tools
- [Agent Budget Calculator](https://agentcapital.io/tools/agent-budget-calculator) - estimate per-task, daily, and monthly agent budgets
- [Spend Policy Generator](https://agentcapital.io/tools/spend-policy-generator) - generate JSON/YAML agent spend-policy drafts
- [x402 Fee Estimator](https://agentcapital.io/tools/x402-fee-estimator) - estimate x402 micropayment spend from dated assumptions
- [Agent Budgeting](https://agentcapital.io/agent-budgeting) - practical guide to setting AI agent budgets
- [Agent Wallets](https://agentcapital.io/agent-wallets) - custodial and non-custodial wallet patterns
- [Spend Controls](https://agentcapital.io/spend-controls) - budgets, limits, approvals, and policy controls
- [Agent-to-Agent Payments](https://agentcapital.io/agent-to-agent-payments) - x402, AP2, ACP, and machine-payment rails
- [Treasury and Accounting](https://agentcapital.io/treasury-and-accounting) - reconciliation, auditability, and reporting
- [Risks and Open Problems](https://agentcapital.io/risks-and-open-problems) - fraud, custody, prompt injection, and unresolved gaps
- [Glossary](https://agentcapital.io/glossary) - terms
- [Sources](https://agentcapital.io/sources) - annotated bibliography
- [FAQ](https://agentcapital.io/faq) - concise answers to common questions

## Editorial boundaries

This site is an independent educational publication. It is not financial, legal, tax, accounting, custody, or investment advice. It does not recommend tokens, products, custodians, or payment providers. All tools run client-side in the browser and are planning aids only.

It cross-links x402 implementation depth to [x402 Docs](https://x402docs-com.pages.dev) and compute-market topics to [Compute Market](https://computemarket-io.pages.dev).

Full machine-readable summary: [llms-full.txt](https://agentcapital.io/llms-full.txt)