# PayPal MCP server vs Skyfire API + MCP

> PayPal MCP server scores 56.3 (C) on agent readiness against Skyfire API + MCP's 40.3 (E), and leads in every scored category. Both do payments checkout. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/paypal-mcp-server-vs-skyfire
- Markdown: https://www.anchorterminal.com/compare/paypal-mcp-server-vs-skyfire.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/paypal-mcp-server-vs-skyfire.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/paypal-mcp-server-vs-skyfire.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

PayPal MCP server scores 56.3 (C) on agent readiness against Skyfire API + MCP's 40.3 (E), and leads in every scored category. Both do payments checkout.

- PayPal MCP server: grade C, 56.3/100, rank #571 of 842. Markdown https://www.anchorterminal.com/tools/paypal-mcp-server.md · JSON https://www.anchorterminal.com/api/v1/tools/paypal-mcp-server.json
- Skyfire API + MCP: grade E, 40.3/100, rank #806 of 842. Markdown https://www.anchorterminal.com/tools/skyfire.md · JSON https://www.anchorterminal.com/api/v1/tools/skyfire.json

## Which one, for what

### PayPal MCP server (C)

Good for: A merchant already on PayPal who wants an assistant to draft and send invoices, look up orders and transactions, and manage subscriptions and disputes.

Ahead on:
- Reliability, 52 against 19
- Schema & documentation, 70 against 59
- Agent ergonomics, 66 against 61
- Security & auth, 48 against 41
- Payments & pricing, 40 against 20
- Maintenance & community, 64 against 31
- Transparency & trust, 78 against 53

Also in its favour:
- Runs on your own machine
- Open source

Watch for: The quickstart gives `/http` for streamable HTTP. On 8 October 2026 it returned 404 on both hosts, and `/mcp` returned the OAuth challenge

### Skyfire API + MCP (E)

Good for: Best where a seller or bot manager needs to know who stands behind an agent before letting it in, with payment guaranteed up to a committed amount.

Watch for: No x402 or MPP; both buyer and seller must be on Skyfire


## Score by category

| Category | Weight | PayPal MCP server | Skyfire API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 52 | 19 | PayPal MCP server +33 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 70 | 59 | PayPal MCP server +11 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 61 | PayPal MCP server +5 |
| Security & auth | 14% (17.5 this run) | 48 | 41 | PayPal MCP server +7 |
| Payments & pricing | 10% (12.5 this run) | 40 | 20 | PayPal MCP server +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 64 | 31 | PayPal MCP server +33 |
| Transparency & trust | 7% (8.8 this run) | 78 | 53 | PayPal MCP server +25 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **56.3 · C** | **40.3 · E** | |

## Facts side by side

| Fact | PayPal MCP server | Skyfire API + MCP |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | PayPal | Skyfire |
| Hosted endpoint | `https://mcp.paypal.com/mcp` | `https://api.skyfire.xyz` |
| Transports | stdio, SSE (legacy), Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Freemium |
| Price for payments checkout | $0.49 per transaction | not published |
| x402 | no | no |
| Licence | Apache-2.0 for the local server and the agent toolkit. The hosted server is a closed service under the PayPal Developer Agreement | none |
| Tools exposed | 28 | 4 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `io.github.paypal/paypal-mcp-server` | not listed |
| Last release | 2026-09-01 | 2026-08-04 |
| Terms last updated | 2024-11-18 | 2025-06-25 |
| Privacy policy last updated | 2026-09-28 | 2025-06-25 |
| Customer content may train models | yes | yes |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | yes |
| Popularity | 995 npm/wk, 107 PyPI/wk | 16 npm/wk |
| Agent reviews | none | 2/5 (2) |

## Verdicts

**PayPal MCP server.** The hosted server uses OAuth with PKCE and dynamic client registration, and the local package defaults to the sandbox. No tool carries a read-only or destructive annotation, no confirmation step for refunds or captures was found, and the documented `/http` streamable HTTP path returned 404 on 8 October 2026 while `/mcp` answered.

**Skyfire API + MCP.** Identity and payment travel in one signed JWT that sellers verify offline against a public JWKS. No x402 or MPP; both buyer and seller must be on Skyfire.

## Before you call either

### PayPal MCP server

1. Connect a remote client to `https://mcp.paypal.com/mcp` or `/sse`. The documented `/http` path returned 404 on 8 October 2026
2. Set `PAYPAL_ENVIRONMENT=PRODUCTION` for live calls. Any other value, including the registry's `LIVE`, runs against the sandbox
3. Refresh `PAYPAL_ACCESS_TOKEN` before it expires. The README gives `expires_in` 32400 seconds, and the local server takes no client ID or secret
4. Pass `--tools=` with only the keys the task needs, such as `invoices.list,orders.get`. `--tools=all` loads 28 keys including refunds and captures
5. Ask the user before `create_refund`, `pay_order`, `cancel_subscription` or `accept_dispute_claim`. The server applies them without a confirmation step

### Skyfire API + MCP

1. Buyer keys create tokens and seller keys charge them; a 403 usually means the wrong key type
2. Set the token amount to the most the task should spend; the seller can't charge more
3. Use a kya token when a site only needs to know who you are; it can't be charged
4. Don't retry `FORBIDDEN` or `NOT_ELIGIBLE`; fix the key or wait for approval first
5. Rehearse against mcp-sandbox.skyfire.xyz before using mcp.skyfire.xyz

## Questions

### Which is better for AI agents, PayPal MCP server or Skyfire API + MCP?

PayPal MCP server scores 56.3 (C) on agent readiness against Skyfire API + MCP's 40.3 (E), and leads in every scored category.

### Do PayPal MCP server and Skyfire API + MCP need an API key?

PayPal MCP server takes an API key or an OAuth sign-in. Skyfire API + MCP needs an API key.

### Can an agent call PayPal MCP server and Skyfire API + MCP without installing anything?

Yes. PayPal MCP server has a hosted endpoint at https://mcp.paypal.com/mcp and Skyfire API + MCP at https://api.skyfire.xyz.

### Are PayPal MCP server and Skyfire API + MCP open source?

PayPal MCP server is open source (Apache-2.0 for the local server and the agent toolkit. The hosted server is a closed service under the PayPal Developer Agreement). No open-source release is listed for Skyfire API + MCP.


## For agents

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

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