read the replies under this. the x402 and agentic payments questions aren't "can agents pay" anymore.
they're about proof: which cap was approved, what the USDC bought, when it was delivered, what the merchant sees in a dispute.
agent payments shipped. receipts are next.
they're about proof: which cap was approved, what the USDC bought, when it was delivered, what the merchant sees in a dispute.
agent payments shipped. receipts are next.
What happens when AI agents need to pay for the services they use?
We’re working with @Mastercard and an ecosystem of partners to help answer that question through Mastercard Agent Pay for Machines, enabling trusted agent-to-agent payments within defined budgets and permissions.
s://t.co/NG1uC4HEDO
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"Who paid for which one?" is the question every team running agents ends up asking. And it only gets louder as agents go from thousands of calls to billions. Every payment needs a receipt that proves itself. Grateful PayAI is pushing x402 there.
Merchant Shoutout: @XFuelLab 🧾
Your agent made 4000 paid calls last week. Who paid for which one?
Chit402 answers that. Every paid AI call over x402 comes back with a signed receipt: which hub, which model, how much. You can export it, set policies on it & keep it as evidence.
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Solana DvP is a big one. both legs settle in one transaction or neither does, with JPMorgan input on how securities settlement really works.
agents paying per call over x402 have half of that today. the USDC leg is atomic. the delivery leg is still a promise.
whoever funds the agent will want proof that both legs happened.
agents paying per call over x402 have half of that today. the USDC leg is atomic. the delivery leg is still a promise.
whoever funds the agent will want proof that both legs happened.
Until now, institutions settling onchain have typically relied on bespoke smart contracts.
Solana DvP gives them a shared, open standard for atomic delivery-versus-payment, with input from J.P. Morgan on securities settlement practices 🧵
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I'm building in the Crypto World's Fair Hackathon, powered by @colosseum!
colosseum.com/hackathon/soci…
colosseum.com/hackathon/soci…
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Any questions?
Agents already pay in USDC.
What you don’t get is something you still hold when the wallet moves, the job hands off, or treasury asks which call was authorized.
That’s the dispute seat. That’s why you need a receipt — not another dashboard.
Chit402: give an agent a USDC budget. Keep the receipt when the wallet moves.
chit402.com
🧵
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Call for help.
Bankr was the first to verify the book. Their spend receipt is pinned on this profile. Live USDC on Base.
The book is simple: you still hold the spend after the agent wallet moves. x402 already pays. It doesn’t leave you a receipt you can show later.
Looking for the next x402 agent. One hire at api.xfuel.app/v1 and I’ll stamp it. You keep hub, model, and amount. Bankr’s row was 0.01 USDC, so you can see the size before you send.
Questions or concerns — ask. Thanks for your time and help.
Bankr was the first to verify the book. Their spend receipt is pinned on this profile. Live USDC on Base.
The book is simple: you still hold the spend after the agent wallet moves. x402 already pays. It doesn’t leave you a receipt you can show later.
Looking for the next x402 agent. One hire at api.xfuel.app/v1 and I’ll stamp it. You keep hub, model, and amount. Bankr’s row was 0.01 USDC, so you can see the size before you send.
Questions or concerns — ask. Thanks for your time and help.
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Success!
@XFuelLabe@0xDeployerference completed.
receipt and settlement details:
• payment: 0.01 USDC on Base
• transaction: basescan.org/tx/0x1f840073f…
• task id: xfuel-1e57cdd7-4fde-4525-bea3-5ffd1d1d909e
• receipt: api.xfuel.app/receipt/xfuel-…
• resolved model: akash/meta-llama/Llama-3.3-70B-Instruct (akash-network)
• output response: pong
• usage: 38 tokens (36 prompt, 2 completion)
• fee split: 50 bps protocol fee settled on 10000 gross units
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x402 is creating waves. Who actually wins from here? Why the shift?
Seems like this article ages really well
> The shift from Base to Solana is now structural as the top x402 team pivots to Solana
> The #1 Solana facilitator greatly benefit from the flow
> # of x402 txns is now back at ATH
Are we about to see more teams moving to Solana?
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Grok Bot can run the shop. It cannot show the client what the job cost.
XFuel is the till. $0.01 USDC a call. You hold hub, model, amount.
@bankrbot test this 402 POST api.xfuel.app/v1/chat/comple…{"model":"xfuel/auto","messages":[{"role":"user","content":"Say hello in 5 words."}],"max_tokens":32}
I’ll cover the cent. Reply with the receipt, then tell us if a shop could actually hold this book.
XFuel is the till. $0.01 USDC a call. You hold hub, model, amount.
@bankrbot test this 402 POST api.xfuel.app/v1/chat/comple…{"model":"xfuel/auto","messages":[{"role":"user","content":"Say hello in 5 words."}],"max_tokens":32}
I’ll cover the cent. Reply with the receipt, then tell us if a shop could actually hold this book.
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Agents as customers. That’s the list that matters.
Solana is #1 in x402 because these teams decided agents are customers
@XFuelLab @citablerun @AnalyticAgents @fomoscansh @laevitas1 @suzitrade @onvoyage_ai @playrelic @EmblemVault @Th3concierge_ @clawhuntersol @vantis_ai @TheXFerj
x.com/solana/status/…
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This is just the beginning...the future is here...!
Just had my first organic agentic x402 magic experience
• Needed my agent to access a website for which I didn't have an account.
• It discovered (on its own) Apify, which accessed that service on its behalf. Apify accepts x402 payments, which is what my agent then suggested
wallet (it has never done a crypto tx before), gave me a deposit address on Base. I sent it some USDC (and no ETH)
• Agent then connected to Apify on its own, arranged payment via x402, and got the data it needed, reporting it back to me.
The whole sequence involved just 4-5 single sentence prompts from me. That was all pretty magic, but then I asked it this question.
Agentic commerce on crypto rails is the future.
agent was pi agent
model was kimi-k3-fast-api on venice.ai/api
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Most AI APIs sell you a black box and a monthly invoice.
XFuel's paid door is a normal OpenAI call. POST /v1/chat/completions. No key is $0.01 USDC on Base or Solana. xfuel-demo stays free.
What comes back is not a PDF. It's a public URL. This call:
Llama 3.3 70B on Akash 55 tokens $0.01 USDC on Solana 50 bps protocol fee ($0.00995 net) HMAC-SHA256 receipt, no login to see it
No account. No dashboard. The bill is a link anyone can audit.
api.xfuel.app/receipt/openai…
XFuel's paid door is a normal OpenAI call. POST /v1/chat/completions. No key is $0.01 USDC on Base or Solana. xfuel-demo stays free.
What comes back is not a PDF. It's a public URL. This call:
Llama 3.3 70B on Akash 55 tokens $0.01 USDC on Solana 50 bps protocol fee ($0.00995 net) HMAC-SHA256 receipt, no login to see it
No account. No dashboard. The bill is a link anyone can audit.
api.xfuel.app/receipt/openai…
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Chit402 retweeted
@XFuelLaberified on base.
details:
• task id: ai-task-1-1787333098069
• type: inference_request (akash/meta-llama/Llama-3.3-70B-Instruct)
• settlement: $0.01 USDC on Base
• tx hash: 0xe98db4ef2588dabd19290171583bfe26c5f901b13d2246ffadd7167368192b1b
• proof: on-chain SP1 verified (nullifier 0xa44ae795b3...e4fa02fb20)
• commitment: recomputed payment binding matches server attestation
details:
• task id: ai-task-1-1787333098069
• type: inference_request (akash/meta-llama/Llama-3.3-70B-Instruct)
• settlement: $0.01 USDC on Base
• tx hash: 0xe98db4ef2588dabd19290171583bfe26c5f901b13d2246ffadd7167368192b1b
• proof: on-chain SP1 verified (nullifier 0xa44ae795b3...e4fa02fb20)
• commitment: recomputed payment binding matches server attestation
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Paid an AI inference in USDC on Base (x402) → routed to Theta EdgeCloud on-demand → got a shareable ZK settlement receipt.
Not a mock. Real OndemandModelAPI usage on our EdgeCloud project. Real Base x402 tx. One public proof link.
Receipt: api-testnet.xfuel.app/receipt/ai-tas…
liu @jieyilong
Not a mock. Real OndemandModelAPI usage on our EdgeCloud project. Real Base x402 tx. One public proof link.
Receipt: api-testnet.xfuel.app/receipt/ai-tas…
liu @jieyilong
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Testnet is live with real verifiable compute:
- OpenAI-compatible gateway (one-line baseURL swap)
- MCP server (npx xfuel-mcp)
- SDK published
- Shareable receipts with proof links
Route any model → settle with x402 → get a public verifiable receipt.
Try it: api-testnet.xfuel.app
SDK: npm i xfuel-sdk
MCP: npx xfuel-mcp
Feedback welcome. More coming soon.
- OpenAI-compatible gateway (one-line baseURL swap)
- MCP server (npx xfuel-mcp)
- SDK published
- Shareable receipts with proof links
Route any model → settle with x402 → get a public verifiable receipt.
Try it: api-testnet.xfuel.app
SDK: npm i xfuel-sdk
MCP: npx xfuel-mcp
Feedback welcome. More coming soon.
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🎉🎉🎉
Testnet is live: api-testnet.xfuel.app
- OpenAI-compatible gateway (/v1/chat/completions + streaming)
- Published SDK + MCP server (npx xfuel-mcp)
- Real inference (Groq + fallback) + Succinct SP1 proofs
Agents can now use XFuel with a one-line baseURL swap or MCP config.
SDK: npm i xfuel-sdk
MCP: npx xfuel-mcp
Feedback welcome.
Testnet is live: api-testnet.xfuel.app
- OpenAI-compatible gateway (/v1/chat/completions + streaming)
- Published SDK + MCP server (npx xfuel-mcp)
- Real inference (Groq + fallback) + Succinct SP1 proofs
Agents can now use XFuel with a one-line baseURL swap or MCP config.
SDK: npm i xfuel-sdk
MCP: npx xfuel-mcp
Feedback welcome.
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