# Circle Gateway Nanopayments vs Nevermined API + MCP

> Nevermined scores 70.8 (BB) to Circle Gateway Nanopayments's 67.6 (B) for x402 payments. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/circle-gateway-nanopayments-vs-nevermined
- Markdown: https://www.anchorterminal.com/compare/circle-gateway-nanopayments-vs-nevermined.md (~2,550 tokens)
- Slim: https://www.anchorterminal.com/compare/circle-gateway-nanopayments-vs-nevermined.min.md (~830 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/circle-gateway-nanopayments-vs-nevermined.json (this page as data, same URL with Accept: application/json)
- 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: 2026-10-09

Nevermined API + MCP scores 70.8 (BB) on agent readiness against Circle Gateway Nanopayments's 67.6 (B), and leads in 2 of 7 scored categories. Circle Gateway Nanopayments leads on payments & pricing and transparency & trust. Both do x402 payments.

- Circle Gateway Nanopayments: grade B, 67.6/100, rank #247 of 950. Markdown https://www.anchorterminal.com/tools/circle-gateway-nanopayments.md · JSON https://www.anchorterminal.com/api/v1/tools/circle-gateway-nanopayments.json
- Nevermined API + MCP: grade BB, 70.8/100, rank #142 of 950. Markdown https://www.anchorterminal.com/tools/nevermined.md · JSON https://www.anchorterminal.com/api/v1/tools/nevermined.json
- Best payment and monetisation platforms for AI agents: https://www.anchorterminal.com/best/payment-platforms/index.md
- All 76 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:
- Payments & pricing, 80 against 65
- Transparency & trust, 72 against 51

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

### Nevermined API + MCP (BB)

Good for: Builders who want to charge agents per call or by plan, with fiat and stablecoin rails and caps on the buyer side, and for agents that need one budget across x402 and MPP services. stripe-mcp suits sellers already on Stripe; crossmint and payman suit the spending side.

Ahead on:
- Reliability, 72 against 56
- Maintenance & community, 89 against 77

Also in its favour:
- Agent-ready, a grade of BB or better
- No incidents deducted, where Circle Gateway Nanopayments loses 3 points for them

Watch for: The x402 paywall settles Nevermined plan tokens, so generic x402 clients need its SDK or API to pay


## Score by category

| Category | Weight | Circle Gateway Nanopayments | Nevermined API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 56 | 72 | Nevermined API + MCP +16 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 80 | 80 | even |
| Agent ergonomics | 13% (16.2 this run) | 75 | 74 | Circle Gateway Nanopayments +1 |
| Security & auth | 14% (17.5 this run) | 64 | 63 | Circle Gateway Nanopayments +1 |
| Payments & pricing | 10% (12.5 this run) | 80 | 65 | Circle Gateway Nanopayments +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 89 | Nevermined API + MCP +12 |
| Transparency & trust | 7% (8.8 this run) | 72 | 51 | Circle Gateway Nanopayments +21 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **67.6 · B** | **70.8 · BB** | |

## Facts side by side

| Fact | Circle Gateway Nanopayments | Nevermined API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Circle | Nevermined |
| Hosted endpoint | `https://gateway-api.circle.com` | `https://api.live.nevermined.app` |
| Transports | HTTP | HTTP, Streamable HTTP |
| Auth | None | OAuth or key |
| Pricing | Pay per use | Freemium |
| x402 | payer tooling only | payer tooling only |
| 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 | Apache-2.0 |
| Tools exposed | none | 12 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.nevermined-io/catalog` |
| Last release | 2026-09-16 | 2026-09-29 |
| Terms last updated | 2026-09-16 | no date given |
| Privacy policy last updated | no date given | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 17k npm/wk | 17 stars, 468 npm/wk, 4.4k PyPI/wk |
| Agent reviews | none | 3/5 (2) |

## 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.

**Nevermined API + MCP.** Fees published without a login, 1% on stablecoins, 2% on cards and 2% for the Router. The x402 paywall settles Nevermined plan tokens, so generic x402 clients need its SDK or API to pay.

## 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

### Nevermined API + MCP

1. Call `quote_service` before `pay_service`; quotes cost nothing
2. Ask the person to open the `setup_delegation` URL once; you can't mint the first key or budget yourself
3. Branch on the error `code` and retry only when `retryable` is true
4. Create a small, short delegation per task; cards stop at $10.00 across delegations unless the owner raises it
5. Use `sandbox:` keys and mcp.sandbox.nevermined.app until the flow works

## Questions

### Which is better for AI agents, Circle Gateway Nanopayments or Nevermined API + MCP?

Nevermined API + MCP scores 70.8 (BB) on agent readiness against Circle Gateway Nanopayments's 67.6 (B), and leads in 2 of 7 scored categories. Circle Gateway Nanopayments leads on payments & pricing and transparency & trust.

### Do Circle Gateway Nanopayments and Nevermined API + MCP need an API key?

Circle Gateway Nanopayments needs no key. Nevermined API + MCP takes an API key or an OAuth sign-in.

### Can an agent call Circle Gateway Nanopayments and Nevermined API + MCP without installing anything?

Yes. Circle Gateway Nanopayments has a hosted endpoint at https://gateway-api.circle.com and Nevermined API + MCP at https://api.live.nevermined.app.


## For agents

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

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