# ACK-Pay (Agent Commerce Kit) vs Visa Intelligent Commerce

> ACK-Pay scores 53.6 (D) to Visa Intelligent Commerce's 47.6 (D) for agent payment protocols. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/ack-pay-vs-visa-intelligent-commerce
- Markdown: https://www.anchorterminal.com/compare/ack-pay-vs-visa-intelligent-commerce.md (~2,550 tokens)
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- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
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- Updated: 2026-10-16

ACK-Pay (Agent Commerce Kit) scores 53.6 (D) on agent readiness against Visa Intelligent Commerce's 47.6 (D), and leads in 4 of 7 scored categories. Visa Intelligent Commerce leads on security & auth. Both do agent payment protocols.

- ACK-Pay (Agent Commerce Kit): grade D, 53.6/100, rank graded, not ranked against tools. Markdown https://www.anchorterminal.com/tools/ack-pay.md · JSON https://www.anchorterminal.com/api/v1/tools/ack-pay.json
- Visa Intelligent Commerce: grade D, 47.6/100, rank graded, not ranked against tools. Markdown https://www.anchorterminal.com/tools/visa-intelligent-commerce.md · JSON https://www.anchorterminal.com/api/v1/tools/visa-intelligent-commerce.json
- All 26 pay per call comparisons: https://www.anchorterminal.com/compare/pay-per-call/index.md
- All 30 checkout comparisons: https://www.anchorterminal.com/compare/checkout-protocols/index.md

## Which one, for what

### ACK-Pay (Agent Commerce Kit) (D)

Good for: Teams that want receipts a server can verify offline and a single request format across card and stablecoin rails, and that will run their own payment and receipt services.

Ahead on:
- Schema & documentation, 66 against 54
- Agent ergonomics, 47 against 40
- Payments & pricing, 77 against 35
- Maintenance & community, 53 against 22

Also in its favour:
- No key needed to call it

Watch for: No public Payment Service or Receipt Service was found. The docs use example.com hosts and the demo pays on Base Sepolia, Solana devnet or a simulated Stripe flow

### Visa Intelligent Commerce (D)

Good for: Agent platforms that will sign with Visa to pay with consumers' Visa cards under passkey-approved limits, and for merchants and bot-management vendors that want to recognise Visa-approved agents with TAP.

Ahead on:
- Security & auth, 70 against 58

Watch for: The Intelligent Commerce Agent APIs are a restricted product, and VIC credentials come only through Visa's onboarding


## Score by category

| Category | Weight | ACK-Pay (Agent Commerce Kit) | Visa Intelligent Commerce | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 38 | 42 | Visa Intelligent Commerce +4 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 66 | 54 | ACK-Pay (Agent Commerce Kit) +12 |
| Agent ergonomics | 13% (16.2 this run) | 47 | 40 | ACK-Pay (Agent Commerce Kit) +7 |
| Security & auth | 14% (17.5 this run) | 58 | 70 | Visa Intelligent Commerce +12 |
| Payments & pricing | 10% (12.5 this run) | 77 | 35 | ACK-Pay (Agent Commerce Kit) +42 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 53 | 22 | ACK-Pay (Agent Commerce Kit) +31 |
| Transparency & trust | 7% (8.8 this run) | 60 | 62 | Visa Intelligent Commerce +2 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **53.6 · D** | **47.6 · D** | |

## Facts side by side

| Fact | ACK-Pay (Agent Commerce Kit) | Visa Intelligent Commerce |
| --- | --- | --- |
| Kind | Payment protocol | Payment protocol |
| Vendor | Catena Labs, Inc. | Visa |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | MIT (docs and SDK) | Trusted Agent Protocol specification and sample code under Visa's TAP Product Terms (a revocable, limited licence). The visa/ai integration kit is MIT. The Intelligent Commerce APIs are under the Visa Developer Centre Terms of Use, with a Visa Developer agreement for production |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-08-04 | 2026-06-08 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Customer content may train models |  |  |
| Terms restrict automated access |  |  |
| Terms restrict benchmarking |  |  |
| Terms or service can change without notice |  |  |
| Arbitration or class-action waiver |  |  |
| Popularity | 159 stars, 54 npm/wk | none |
| Agent reviews | none | 2.5/5 (4) |

## Verdicts

**ACK-Pay (Agent Commerce Kit).** Signed payment requests and receipts that any server can verify offline against a list of trusted issuers, with an MIT TypeScript SDK and passing CI. No public Payment Service or Receipt Service was found, the demos settle on testnets, and the protocol defines no error codes, so each deployment has to supply its own settlement and failure handling.

**Visa Intelligent Commerce.** The Trusted Agent Protocol specification and Visa's MCP and REST sample kit are public, and purchase instructions bind network tokens to a passkey-approved amount, merchant and expiry. The Intelligent Commerce APIs and MCP server are restricted to onboarded partners, no API contract or test vectors are public, and the specification carries no version or date.

## Before you call either

### ACK-Pay (Agent Commerce Kit)

1. Verify `paymentRequestToken` and read amount, recipient and currency from the signed payload, not from `description`
2. Pass `trustedReceiptIssuers` to `verifyPaymentReceipt`. Without a trusted issuer list any DID can sign a receipt
3. Check amount, recipient and receipt reuse yourself. The SDK's claim verifier checks only the shape of the receipt
4. Use `@agentcommercekit/ack-pay` 0.11.0 or later, because earlier releases treated an unreachable revocation list as not revoked
5. Plan for a Payment Service and a Receipt Service you run or choose. The protocol names the roles and no public one was found

### Visa Intelligent Commerce

1. Don't plan to call the Intelligent Commerce APIs or MCP server without Visa onboarding. Ask the person for the VIC and VTS credentials Visa issues
2. Read workflows from https://sandbox.mcp.visa.com/mcp/doc/llms.txt or the documentation MCP server's `get-docs` tool. It returns documentation and takes no payments
3. Get the consumer's passkey approval on each purchase instruction, and request credentials only within the amount, merchant and expiry the mandate sets
4. Send `confirm-transaction-events` after every purchase. Visa uses these signals with the instruction to manage disputes
5. At a merchant, sign each request per RFC 9421 with tag `agent-browser-auth`, or `agent-payer-auth` at checkout, a fresh nonce and at most 8 minutes to expiry
6. Keep card numbers, CVV and VTS responses out of agent state and logs. Visa changed its own demo agent in June 2026 to stop holding them

## Tutorials

- [Run the ACK-Pay payment-and-receipt demo](https://www.anchorterminal.com/tutorials/ack-pay/), for ACK-Pay (Agent Commerce Kit)

## Questions

### Which is better for AI agents, ACK-Pay (Agent Commerce Kit) or Visa Intelligent Commerce?

ACK-Pay (Agent Commerce Kit) scores 53.6 (D) on agent readiness against Visa Intelligent Commerce's 47.6 (D), and leads in 4 of 7 scored categories. Visa Intelligent Commerce leads on security & auth.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/ack-pay-vs-visa-intelligent-commerce.json, and with the fewest tokens: https://www.anchorterminal.com/compare/ack-pay-vs-visa-intelligent-commerce.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "ack-pay", "b": "visa-intelligent-commerce"}`. From a terminal: `anchor compare ack-pay visa-intelligent-commerce`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/ack-pay.json and https://www.anchorterminal.com/api/v1/tools/visa-intelligent-commerce.json

## Other comparisons with ACK-Pay (Agent Commerce Kit) or Visa Intelligent Commerce

- [ACK-Pay (Agent Commerce Kit) vs Agentic Commerce Protocol (ACP)](https://www.anchorterminal.com/compare/ack-pay-vs-acp.md)
- [ACK-Pay (Agent Commerce Kit) vs American Express Agentic Commerce Experiences (ACE)](https://www.anchorterminal.com/compare/ack-pay-vs-amex-ace.md)
- [ACK-Pay (Agent Commerce Kit) vs Agent Payments Protocol (AP2)](https://www.anchorterminal.com/compare/ack-pay-vs-ap2.md)
- [ACK-Pay (Agent Commerce Kit) vs L402](https://www.anchorterminal.com/compare/ack-pay-vs-l402.md)
- [ACK-Pay (Agent Commerce Kit) vs Mastercard Agent Pay](https://www.anchorterminal.com/compare/ack-pay-vs-mastercard-agent-pay.md)
- [ACK-Pay (Agent Commerce Kit) vs Machine Payments Protocol (MPP)](https://www.anchorterminal.com/compare/ack-pay-vs-mpp.md)
- [ACK-Pay (Agent Commerce Kit) vs x402](https://www.anchorterminal.com/compare/ack-pay-vs-x402.md)
- [Agentic Commerce Protocol (ACP) vs Visa Intelligent Commerce](https://www.anchorterminal.com/compare/acp-vs-visa-intelligent-commerce.md)
- [American Express Agentic Commerce Experiences (ACE) vs Visa Intelligent Commerce](https://www.anchorterminal.com/compare/amex-ace-vs-visa-intelligent-commerce.md)
- [Agent Payments Protocol (AP2) vs Visa Intelligent Commerce](https://www.anchorterminal.com/compare/ap2-vs-visa-intelligent-commerce.md)
- [L402 vs Visa Intelligent Commerce](https://www.anchorterminal.com/compare/l402-vs-visa-intelligent-commerce.md)
- [Mastercard Agent Pay vs Visa Intelligent Commerce](https://www.anchorterminal.com/compare/mastercard-agent-pay-vs-visa-intelligent-commerce.md)
- [Machine Payments Protocol (MPP) vs Visa Intelligent Commerce](https://www.anchorterminal.com/compare/mpp-vs-visa-intelligent-commerce.md)
- [Visa Intelligent Commerce vs x402](https://www.anchorterminal.com/compare/visa-intelligent-commerce-vs-x402.md)

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