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AgentSIM

Runs SMS, email and passkey auth challenges on apps you own and returns a verdict to a coding or browser agent.

From $99/moActively maintained

Developer toolsFor developersFree tier
agentsim.dev ↗LinkedInXGitHub
Open agentsim.devAlternativesSet it up for my teamIs AgentSIM yours? Claim the card →
At a glanceswept Oct 24, 2026

≈ 1visits/mo

Little sign of use · estimate, read Oct 14, 2026

For
Builders running AI agents against apps they own, in staging, CI, or live runs
Price
From $99/mopricing page, read Oct 21, 2026
Activity
Actively maintainedrelease 3 weeks ago · site updated 3 weeks ago
Runs as
SDK
Used for
  • Run auth challenges inside CI pipeline tests
  • Return SMS verification codes to a running agent
  • Stop agent runs safely at refused auth walls
read off agentsim.dev on Oct 21, 2026
Worth knowingcomputed from what we read · each with its source
Pricingpricing page, read Oct 21, 2026

From $99/mo

pricing page

How a program reaches itfound, not claimed · read Oct 21, 2026
  • MCP serverdev.agentsim/mcpverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-21
  • Address to connectmcp.agentsim.dev/mcp
  • OpenAPI spec9 pathsthe spec ↗
  • API docsdocs.agentsim.dev/api-reference/overviewthe vendor's page ↗
  • MCP docsdocs.agentsim.dev/mcp/connectthe vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Developer toolsby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is AgentSIM?

    Runs SMS, email and passkey auth challenges on apps you own and returns a verdict to a coding or browser agent. It is listed in the Atlas under Developer tools.

  • Who is AgentSIM for?

    Builders running AI agents against apps they own, in staging, CI, or live runs

  • How much does AgentSIM cost?

    Paid plans start at $99/mo, per AgentSIM's pricing page on 2026-10-21.

  • Do people use AgentSIM?

    Little sign of use: ≈ 1 visits/mo · estimate, 2026-10.

  • Is AgentSIM still maintained?

    Actively maintained: release 3 weeks ago · site updated 3 weeks ago.

  • How do I cancel AgentSIM?

    In its own words (terms of service, 2026-10-21): “We will refund the first payment in full and cancel the subscription for eligible requests.”

  • Does AgentSIM give refunds?

    In its own words (terms of service, 2026-10-21): “If AgentSIM cannot run a workflow we confirmed as supported, request a full refund of your first payment for paid live access and cancellation within 14 days of purchase.”

  • What are alternatives to AgentSIM?

    In Developer tools, by use: Cursor, Reflect AI, Bugster, testRigor AI-Based Automated Testing Tool, Checkly, Mabl.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk