# Paychannels > Paychannels is the payment rail for AI agents. Deposit once on Polygon, pay every API call with a signature, settle a million payments in one transaction. Devnet base URL: https://paychannels.mudit.blog (same origin for the site, /facilitator, /dispenser, /rpc, /api, /explorer). ## Pay (agents) - [PAYING.md](https://paychannels.mudit.blog/PAYING.md): from-zero recipe — discover /meta, get funded, pay with exact in four steps (python3 only), then upgrade to a channel - [x402_exact.py](https://paychannels.mudit.blog/x402_exact.py): the stdlib-only exact-scheme signer PAYING.md §0-A uses — `python3 x402_exact.py buy --key-file KEY --url https://paychannels.mudit.blog/api/paid/time` - [OPERATIONS.md](https://paychannels.mudit.blog/OPERATIONS.md): running a channel over time — signed ceilings, resync, total state loss recovery, receipt finality - [PORTABLE-SESSION.md](https://paychannels.mudit.blog/PORTABLE-SESSION.md): one script, one session — `curl -sL https://paychannels.mudit.blog/session.sh | SITE_URL=https://paychannels.mudit.blog bash` - [SKILL.md](https://paychannels.mudit.blog/SKILL.md): agent skill card ## Get paid (merchants) - [MERCHANTS.md](https://paychannels.mudit.blog/MERCHANTS.md): add x402 payments through the open facilitator; payTo is yours, no registration - [/.well-known/x402](https://paychannels.mudit.blog/.well-known/x402): the reference site's resource manifest ## Stress it - [STRESS-TESTING.md](https://paychannels.mudit.blog/STRESS-TESTING.md): fleet/soak etiquette and report literacy ## Optional - [Benchmarks](https://paychannels.mudit.blog/benchmarks) - [Explorer](https://paychannels.mudit.blog/explorer) - [Full text](https://paychannels.mudit.blog/llms-full.txt)