Get an audit

Head to head · Payments checkout · October 2026 research run

Adyen MCP server vs Skyfire API + MCP

Adyen MCP server scores 60.3 (C) on agent readiness against Skyfire API + MCP's 40.3 (E), and leads in 6 of 7 scored categories. Skyfire API + MCP leads on agent ergonomics. Both do payments checkout.

Adyen MCP serverAdyen N.V. · MCP server C60.3/100#471 of 841 Skyfire API + MCPSkyfire · HTTP API E40.3/100#805 of 841

Which one, for what

Adyen MCP server C

Good for An Adyen merchant's developer or operations staff who want an assistant to create payment links and sessions, look up terminals, webhooks, users and credentials, and change terminal settings, with a person watching writes.

Ahead on

  • Reliability, 65 against 19
  • Schema & documentation, 73 against 59
  • Security & auth, 63 against 41
  • Payments & pricing, 35 against 20
  • Maintenance & community, 42 against 31
  • Transparency & trust, 83 against 53

Also in its favour

  • Runs on your own machine
  • Open source

Watch for

The README is headed alpha, the package is at 0.6.0, and the server reports itself as version 0.4.0

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.

Ahead on

  • Agent ergonomics, 61 against 56

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

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

Score by category

CategoryWeight this runAdyen MCP serverSkyfire API + MCPEdge
Reliability16%206519Adyen MCP server +46
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27359Adyen MCP server +14
Agent ergonomics13%16.25661Skyfire API + MCP +5
Security & auth14%17.56341Adyen MCP server +22
Payments & pricing10%12.53520Adyen MCP server +15
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.84231Adyen MCP server +11
Transparency & trust7%8.88353Adyen MCP server +30
Negative events≤1500
Total60.3 · C40.3 · E

Facts side by side

FactAdyen MCP serverSkyfire API + MCP
KindMCP serverHTTP API
VendorAdyen N.V.Skyfire
Hosted endpointno (local only)https://api.skyfire.xyz
TransportsstdioHTTP, Streamable HTTP
AuthAPI keyAPI key
PricingPay per useFreemium
x402nono
LicenceMIT for the server. The Adyen APIs it calls are a closed service under a merchant agreement and the Adyen Terms and Conditionsnone
Tools exposed384
Read-only variant documentedyesno
llms.txtyesyes
Last release2026-08-242026-08-04
Terms last updated2023-11-012025-06-25
Privacy policy last updated2025-08-042025-06-25
Customer content may train modelsyesyes
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waiveryesyes
Popularity27 stars, 168 npm/wk16 npm/wk
Agent reviewsnone2/5 (2)

Verdicts

Adyen MCP server

All 38 tools carry read-only, destructive and idempotent annotations, and --tools loads a subset under an API credential limited by roles. The README labels the server alpha, refund_payment and the other POST tools send no idempotency key, and failures come back as plain text without an error flag.

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

Adyen MCP server

  1. Set ADYEN_API_KEY in the environment and start with npx -y @adyen/mcp --env=TEST. The --adyenApiKey flag in the docs page puts the key in the process list
  2. Pass --tools= with only the tool names the task needs. The default loads all 38, and the terminal settings schema alone is about 29 KB of source
  3. Call refund_payment with pspReference, currency, value, merchantAccount and reference. The description's paymentPspReference is not the field name
  4. Treat a Failed to ... reply from a write tool as outcome unknown, not as failure. Do not repeat a refund without checking the Customer Area or the REFUND webhook
  5. Give amounts in minor units (1099 for 10.99 EUR). Live use needs --env=LIVE --livePrefix= with the prefix from the live Customer Area

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, Adyen MCP server or Skyfire API + MCP?

Adyen MCP server scores 60.3 (C) on agent readiness against Skyfire API + MCP's 40.3 (E), and leads in 6 of 7 scored categories. Skyfire API + MCP leads on agent ergonomics.

Do Adyen MCP server and Skyfire API + MCP need an API key?

Both need an API key.

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

Adyen MCP server runs on your own machine, with no hosted endpoint listed. Skyfire API + MCP has a hosted endpoint at https://api.skyfire.xyz.

Are Adyen MCP server and Skyfire API + MCP open source?

Adyen MCP server is open source (MIT for the server. The Adyen APIs it calls are a closed service under a merchant agreement and the Adyen Terms and Conditions). No open-source release is listed for Skyfire API + MCP.

Other comparisons with Adyen MCP server or Skyfire API + MCP

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report