Category · Work & business apps
Agent tool access: app actions and authentication for agents
Services that hand an agent ready-made actions across thousands of apps, with the OAuth connections and credentials handled for you. Compared on action coverage, how authorisation works per end user, what the agent sees in its context, logs and price per call. Workflow builders are compared separately.
Capability keys automation.apps · automation.auth · automation.actions · agent.tools · All tools
letme.dev/automation.apps picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 36 | Composio (API + MCP)Composio · HTTP API | Tool access | BB | 75.3 | 3.5 (8) | n/a | n/a | $29 / mo | OAuth or key | Hosted | ||
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Tool access and per-user authentication for agents across 1,000+ apps. Top strength Seven Connect meta-tools, and sessions that load chosen toolkits or filter by read-only and destructive tags Top weakness Rube shut down on 16 May 2026, so old rube.app configs are dead |
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| 280 | Zapier MCP (agent actions)Zapier · MCP server | Tool access | C | 58.4 | 2.5 (2) | n/a | n/a | Your plan | OAuth or key | Hosted | ||
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Hosted MCP server that lets agents discover and run actions across apps connected to the user's Zapier account. Top strength 16 meta-tools in agentic mode, or managed mode with only the actions you pick Top weakness Connection tokens are long-lived and the docs allow them in the URL query string |
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| 437 | letmeAnchor Terminal · HTTP API | Tool access | F | 36.7 | none | n/a | n/a | Free | None | Hosted | ||
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letme.dev selects tools for a task using Anchor Terminal's grades. Top strength No key, account or card to ask for a pick, over GET, POST or MCP, and every address we called answered without credentials Top weakness Calling through letme, the key and x402 top-ups are specified and not open (calling.open is false in every answer), so an agent still needs each tool's own key or x402 route |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
How we test this category
The same task across email, CRM and a database, driven by an agent through each service. We compare connection setup, how each end user authorises, action coverage, retries, logs and the cost per completed run. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
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.