Aside

Aside is an AI-powered browser from a Y Combinator (Fall 2025) startup that runs an autonomous browser agent to complete real work across the logged-in websites you already use — email, dashboards, internal tools, documents, and spreadsheets — without relying on per-service API integrations. It pairs browsing history used as local memory with the first password manager designed for AI agents (hardware-backed encryption, audit logging), keeps data local-first and end-to-end encrypted, and gates sensitive actions like payments and messages behind human approval. For developers, Aside ships a command-line interface, a Model Context Protocol (MCP) server, and a browser-automation REPL so other agents and coding tools can drive the browser, plus bring-your-own-key support for OpenAI and Anthropic models.

Aside is profiled on the APIs.io network. Tagged areas include Company, AI Browser, Browser Agent, Automation, and MCP.

Aside’s developer surface includes documentation, getting-started guide, support, engineering blog, pricing, changelog, CLI, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

21.3/100 emerging ▬ flat Agent 4/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs 1 MCP Servers

Company AI BrowserBrowser AgentAutomation MCP CLI Password Manager Agentic Web Automation Developer Tools Y Combinator

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 21.3/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 7.1 / 20

Access Clarity 6.3 / 20

Operational Transparency 2.1 / 13

Contract Governance 0.0 / 12

Discoverability 5.7 / 10

Agent readiness — 4/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/aside: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Aside MCP server

Aside ships a first-party Model Context Protocol server exposed through its CLI (`aside mcp`). Any MCP-capable agent or coding tool can connect to it to drive the Aside AI brows...

MCP SERVER

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Aside Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

Build 2

SDKs, sample code, and the tooling you integrate with

CLI

CLI

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: aside
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/aside.png
name: Aside
description: Aside is an AI-powered browser from a Y Combinator (Fall 2025) startup that runs an autonomous browser agent
  to complete real work across the logged-in websites you already use — email, dashboards, internal tools, documents, and
  spreadsheets — without relying on per-service API integrations. It pairs browsing history used as local memory with the
  first password manager designed for AI agents (hardware-backed encryption, audit logging), keeps data local-first and end-to-end
  encrypted, and gates sensitive actions like payments and messages behind human approval. For developers, Aside ships a command-line
  interface, a Model Context Protocol (MCP) server, and a browser-automation REPL so other agents and coding tools can drive
  the browser, plus bring-your-own-key support for OpenAI and Anthropic models.
url: https://raw.githubusercontent.com/api-evangelist/aside/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- AI Browser
- Browser Agent
- Automation
- MCP
- CLI
- Password Manager
- Agentic
- Web Automation
- Developer Tools
- Y Combinator
tags_raw:
- Company
- AI Browser
- Browser Agent
- Automation
- Model Context Protocol
- MCP
- CLI
- Password Manager
- Agentic
- Web Automation
- Developer Tools
- Y Combinator
apis: []
common:
- type: DomainSecurity
  url: security/aside-domain-security.yml
- type: Website
  url: https://aside.com
- type: Documentation
  url: https://docs.aside.com
- type: GettingStarted
  url: https://docs.aside.com/help/get-started
- type: Support
  url: https://aside.com/community
- type: Blog
  url: https://aside.com/blog
- type: Pricing
  url: https://aside.com/pricing
- type: TermsOfService
  url: https://aside.com/policy/terms
- type: PrivacyPolicy
  url: https://aside.com/policy/privacy
- type: ChangeLog
  url: https://docs.aside.com/changelog/native
- type: ChangeLog
  name: Aside changelog (structured)
  url: changelog/aside-changelog.yml
- type: MCPServer
  name: Aside MCP server
  url: mcp/aside-mcp.yml
- type: CLI
  name: Aside CLI
  url: cli/aside-cli.yml
- type: Packages
  name: Aside packages
  url: packages/aside-packages.yml
- type: LLMsTxt
  url: llms/aside-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/aside"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/aside/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/aside/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.