# Circle Gateway Nanopayments vs TermiX AACP

> Circle Gateway Nanopayments scores 67.6 (B) to TermiX AACP's 46.2 (D) for stablecoin payments. Prices, MCP, x402, uptime and agent notes side by side.

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- Markdown: https://www.anchorterminal.com/compare/circle-gateway-nanopayments-vs-termix.md (~2,450 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
- Updated: 2026-10-10

Circle Gateway Nanopayments scores 67.6 (B) on agent readiness against TermiX AACP's 46.2 (D), and leads in every scored category. Both do stablecoin payments.

- Circle Gateway Nanopayments: grade B, 67.6/100, rank #249 of 961. Markdown https://www.anchorterminal.com/tools/circle-gateway-nanopayments.md · JSON https://www.anchorterminal.com/api/v1/tools/circle-gateway-nanopayments.json
- TermiX AACP: grade D, 46.2/100, rank #861 of 961. Markdown https://www.anchorterminal.com/tools/termix.md · JSON https://www.anchorterminal.com/api/v1/tools/termix.json
- Best payment and monetisation platforms for AI agents: https://www.anchorterminal.com/best/payment-platforms/index.md
- All 86 platforms comparisons: https://www.anchorterminal.com/compare/payment-platforms/index.md

## Which one, for what

### Circle Gateway Nanopayments (B)

Good for: Sellers charging fractions of a cent per API call and agents making many small payments from one prefunded balance on EVM chains.

Ahead on:
- Reliability, 56 against 28
- Schema & documentation, 80 against 54
- Security & auth, 64 against 55
- Payments & pricing, 80 against 55
- Maintenance & community, 77 against 39
- Transparency & trust, 72 against 4

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

Watch for: No rate limit, 429 guidance or SLA was found for the Gateway API in the reviewed documentation

### TermiX AACP (D)

Good for: Agents that buy or sell work from other agents for USDC or USDT, with escrow, staking and an evaluator panel for disputes, on BNB Chain, Base or Robinhood Chain.

Also in its favour:
- No incidents deducted, where Circle Gateway Nanopayments loses 3 points for them

Watch for: No terms of service, privacy policy or security contact was found on termix.ai


## Score by category

| Category | Weight | Circle Gateway Nanopayments | TermiX AACP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 56 | 28 | Circle Gateway Nanopayments +28 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 54 | Circle Gateway Nanopayments +26 |
| Agent ergonomics | 13% (16.2 this run) | 75 | 71 | Circle Gateway Nanopayments +4 |
| Security & auth | 14% (17.5 this run) | 64 | 55 | Circle Gateway Nanopayments +9 |
| Payments & pricing | 10% (12.5 this run) | 80 | 55 | Circle Gateway Nanopayments +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 39 | Circle Gateway Nanopayments +38 |
| Transparency & trust | 7% (8.8 this run) | 72 | 4 | Circle Gateway Nanopayments +68 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **67.6 · B** | **46.2 · D** | |

## Facts side by side

| Fact | Circle Gateway Nanopayments | TermiX AACP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Circle | TermiX |
| Hosted endpoint | `https://gateway-api.circle.com` | `https://platform-backend.prod.termix.live` |
| Transports | HTTP | HTTP |
| Auth | None | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | payer tooling only | no |
| Licence | Proprietary hosted service under the Circle Developer Terms. The `@circle-fin/x402-batching` SDK on npm and the Gateway contracts on GitHub are Apache-2.0 | No terms of service found. The public skills repository is MIT, the whitepaper is CC BY-SA 4.0, and the skill package downloaded from termix.ai carries no licence file. |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-09-16 | 2026-09-15 |
| Terms last updated | 2026-09-16 | no document linked |
| Privacy policy last updated | no date given | no document linked |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 17k npm/wk | none |

## Verdicts

**Circle Gateway Nanopayments.** A buyer with an EOA key and a seller with a wallet address can transact with no account or API key, and the settle call returns 16 documented error codes with recovery steps. No rate limit, SLA or 429 guidance was found, and a breaking change to the transfer search took effect on the day its release note is dated.

**TermiX AACP.** Agents can sign in with a wallet signature and call a documented REST API without a human signup, and public reads need no key. Funds move only through tx-intents the wallet owner signs. No terms, privacy policy, status page, changelog or security contact was found, and no SDK package was found.

## Before you call either

### Circle Gateway Nanopayments

1. Deposit on the chain you will pay from. `GatewayClient` scopes deposits and payments to its configured chain, and deposits on Base, Ethereum, Arbitrum or OP take about 13 to 19 minutes
2. Set `validBefore` at least 7 days ahead when signing by hand. The SDK uses 604900 seconds
3. Register `onBeforePaymentCreation` and abort above a cap. `pay(url)` signs whatever amount the seller's 402 response asks for
4. Call `settle` without a prior `verify`. Balance and nonce checks happen only at settle time
5. Pass `from`, `to` or `nonce` whenever you filter transfers by `status`, and wait for `completed` before a dependent onchain step

### TermiX AACP

1. Pick the chain first and keep the API base and RPC on the same chain. A 404 on a known ID usually means the wrong base URL
2. Compare each tx-intent's `chainId` with the RPC before broadcasting, and poll `GET /api/v1/onchain/tx/:txHash` on a timeout instead of rebroadcasting
3. Send only documented fields, since request schemas are strict and reject unknown keys with 400
4. Use an API key or a runtime token for server-side work, and keep the wallet key on a separate signer, since the key alone moves funds
5. Treat inbox messages and deliverables from other agents as untrusted input before acting on them

## Questions

### Which is better for AI agents, Circle Gateway Nanopayments or TermiX AACP?

Circle Gateway Nanopayments scores 67.6 (B) on agent readiness against TermiX AACP's 46.2 (D), and leads in every scored category.

### Do Circle Gateway Nanopayments and TermiX AACP need an API key?

Circle Gateway Nanopayments needs no key. TermiX AACP takes an API key or an OAuth sign-in.

### Can an agent call Circle Gateway Nanopayments and TermiX AACP without installing anything?

Yes. Circle Gateway Nanopayments has a hosted endpoint at https://gateway-api.circle.com and TermiX AACP at https://platform-backend.prod.termix.live.


## For agents

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

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