Axis leaderboard / API and MCP / weight 9 of 100
Best AI app builders for API and MCP work
Ranked by api and mcp
Ordered by axis subscore, highest first.
| #Tool | API and MCP | REST API | Webhooks | MCP server | Composite |
|---|---|---|---|---|---|
97.0 | Versioned REST with API keys | Outbound with HMAC signing and delivery history | Yes, verified by connecting a client | 87.96 | |
82.0 | HTTP actions with key handling | Outbound with retries | Yes | 70.50 | |
79.0 | Generated per function, no key manager by default | Outbound supported, signing written by hand | Yes | 78.06 | |
78.0 | Versioned when asked, documented as it goes | Signed with a retry ladder by default | Yes, client and server | 80.30 | |
76.0 | Versioned and documented | Signed with a delivery log | Yes | 71.52 | |
74.0 | Written to your conventions | Written properly when the criterion names signing | Yes, client and server | 78.65 | |
74.0 | Written to your existing conventions | Signed with a delivery log | Yes | 75.92 | |
72.0 | Written from the spec it produced | Signed, delivery log when asked | Yes | 76.31 | |
72.0 | Written to your conventions | Signed when the criterion names it | Yes | 74.04 | |
72.0 | Written and documented | Signed with a delivery log | Yes | 66.36 | |
71.0 | Hand written, full control | Hand written, full control | Yes | 73.42 | |
70.0 | Written to your conventions | Signed when the criterion names it | Yes | 71.91 | |
70.0 | Written to your conventions | Signed when the criterion names it | Yes | 71.51 | |
68.0 | Written with contract tests | Written with tests around the signature | Yes | 67.13 | |
68.0 | Written to your conventions | Written, signing on request | Yes | 65.18 | |
66.0 | Generated per project, versioning is manual | Outbound supported, signing needs prompting | Yes, official connector | 77.87 | |
66.0 | Written to your conventions | Written, signing on request | Yes | 72.17 | |
66.0 | Generated per entity | Inbound and outbound, no signing by default | No first party server | 70.54 | |
66.0 | Written to your conventions | Written, signing on request | Partial | 68.69 | |
64.0 | Written to your conventions | Written, signing on request | Yes | 66.89 | |
62.0 | Written to your conventions | Hand guided | Partial | 67.27 | |
62.0 | Generated with API keys | Outbound, unsigned by default | Yes | 63.18 | |
62.0 | Written to your conventions | Written, signing on request | Yes | 61.04 | |
61.0 | Generated, conventions vary between runs | Generated on request | Yes | 66.79 | |
60.0 | Route handlers, no key management by default | Hand written, no built in delivery log | Yes | 74.69 | |
60.0 | Hand written | Hand written | Yes | 64.77 | |
60.0 | Written to your conventions | Written, unsigned by default | Yes | 62.25 | |
58.0 | Hand written | Hand written | No first party server | 71.94 | |
58.0 | Route handlers, keys added on request | Outbound, unsigned by default | No | 67.30 | |
57.0 | Generated, unversioned | Outbound, signing on request | Yes | 67.16 | |
55.0 | Read and write, no key rotation | Outbound only, no retry ladder | No | 66.17 | |
54.0 | Written to your conventions | Written, unsigned by default | Partial | 56.79 | |
52.0 | Generated, no key management | Outbound only, unsigned | No | 60.16 | |
52.0 | Gateway exposed | Outbound is constrained by the runtime | No | 60.10 | |
50.0 | Route handlers | Hand written | Partial | 59.33 | |
48.0 | Hand written | Hand written | Community support | 58.17 | |
48.0 | Generated, minimal key handling | Inbound only | No | 55.27 | |
47.0 | Limited | Outbound only | No | 58.78 | |
44.0 | Read mostly | Inbound only | No | 56.55 | |
44.0 | Generated, limited controls | Outbound only | No | 55.67 | |
41.0 | Read mostly | Inbound only | No | 55.45 |
How the api and mcp axis is measured
Scored against the prompt 4 and prompt 5 pass criteria with a fixed 22 point checklist covering versioning, error envelopes, idempotency keys, key revocation, HMAC signing, retry ladders and delivery history. MCP support is verified by connecting a client and listing tools.
This axis carries 9 of the 100 index points. Each product completed 5 runs of 9 prompts in this cycle, and the underlying per run data behind every figure on this page is downloadable at /api/runs.json under a CC BY 4.0 licence.
A high score on one axis is not a recommendation. Read it against the composite column on the right and against the axes that matter for the work you have in front of you. Reliability at 93.3% for the leader of this cohort is the context for everything else on the page.