Open source · MIT · non-custodial · built in Finland
Sponsor the open-source rails for the AI agent economy
PayBotFin lets autonomous AI agents pay each other in stablecoins — across chains, without custody, without lock-in. The incumbents are building closed rails. This one stays open — if the people who'll use it sponsor the work.
Why sponsor this
We hoped banks would back it. They back incumbents. So it's being built independently — and the honest way to keep it open and moving is for the community and the ecosystem to sponsor the work directly. Your sponsorship funds full-time development and an independent security audit, so this can be trusted with real value while staying MIT and self-hostable.
What's already built
Multi-chain
Base, Optimism, Arbitrum, Polygon — built on Circle-native USDC.
CCTP V2 cross-chain
Native USDC transport between chains (burn → attest → mint).
Gasless & non-custodial
EIP-3009 signed authorizations. The SDK never holds your funds.
Self-hostable
Run your own facilitator. No portal lock-in, no middleman.
Tested
404 unit tests across the SDK. Open code you can read and audit.
Standards-based
Built on the x402 protocol (now under the Linux Foundation).
honest status Built and unit-tested. The next milestone is a live testnet run with public transaction hashes and a security audit — which is what your sponsorship pays for.
Sponsor tiers
Every tier gives something back — this is sponsorship of open-source work, with perks, not a donation.
Supporter
€5/mo
You get
- Your name on the Supporters wall
- Sponsor-only project updates
- A thank-you in release notes
Choose
Backer
€25/mo
Everything above, plus
- Your name/handle in the README backers section
- Early access to new releases
- A vote on roadmap priorities
Choose
Sponsor
€100/mo
Everything above, plus
- Your logo on this page + the README
- A direct support channel
- Priority on issues you file
Choose
Partner
€500/mo
Everything above, plus
- Prominent logo placement
- Monthly support / consultation hours
- Integration help for your stack
Choose
Clicking a tier opens GitHub Sponsors with that amount pre-filled. One-time amounts are welcome too — switch to "one-time" on the GitHub checkout.
What your sponsorship builds
- Full-time development — so the work continues instead of being squeezed between other jobs.
- An independent security audit — review of the settlement & cross-chain logic before it handles real value.
- Mainnet launch — multi-chain go-live, refunds, streaming payments, more chains.
- Docs & examples — so any developer can self-host and integrate in minutes.
The budget
| Full-time development, AI tooling & infrastructure (bundled) | €7,500 / mo |
| Security audit (one-time milestone) | €20k–€40k |
| Monthly goal to sustain the project | €7,500 / mo |
⚠ The monthly goal bundles development time, AI/LLM tooling, and infrastructure into one figure. Figures are a target to confirm before this page goes live.
Ways to support
❤️ GitHub Sponsors
Recurring or one-time, with the perks above. Sits right on the repo.
Sponsor on GitHub
📖 Open Collective (coming soon)
A transparent fund via a fiscal host — being set up. For now, sponsor on GitHub.
Sponsor on GitHub
🟢 Gitcoin Grants
Sponsorships here get matched from a pooled public-goods fund. (Live during grant rounds.)
Follow for the round
Built by
Renata Baldissara-Kunnela — FriendlyAI, Finland
An independent developer building open, non-custodial payment infrastructure for the agent economy. PayBotFin is developed in the open under the MIT license. Sponsorship goes to the work — keeping it free, self-hostable, and independent.
The honest part. Sponsorships here are support for open-source development, with perks in return — not an investment, not equity, not a token, and they carry no financial return. PayBotFin is a non-custodial software tool: it holds no customer funds and makes no claim of regulatory or banking compliance. We tell you exactly what's built and what isn't.