c/side

aid: c-side
name: c/side
description: c/side (cside) is a client-side security platform that detects script attacks, AI agents, account takeover, and
  fraud at the browser layer. It provides active runtime detection that watches what third-party scripts, users, and agents
  actually do as they execute in the live browser session, in real time, rather than relying on static scans or block-lists,
  and it automates PCI DSS 4.0.1 requirements 6.4.3 and 11.6.1 (validated by a VikingCloud QSA). cside deploys as a single
  JavaScript snippet with no proxy and no DNS changes, and was the first client-side security product with integrated AI analysis.
  The platform protects websites from malicious third-party scripts, e-skimming, Magecart, and supply chain attacks, and adds
  device fingerprinting (102+ signals), VPN/bot/AI-agent detection, chargeback evidence, and privacy monitoring for GDPR,
  CCPA, and HIPAA. Founded in 2024 and backed by Uncork Capital, cside integrates via a CLI, Next.js and Vite plugins, a manual
  script tag, and Salesforce Lightning, and sends security alerts through webhook, S3, and Jira/Linear notification endpoints.
  cside publishes an llms.txt, a public read-only MCP server, and a Trust Center covering SOC 2 Type II, PCI SAQ-D, and ISO
  27001.
url: https://raw.githubusercontent.com/api-evangelist/c-side/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- uncork-capital
x-tier: stub
x-tier-reason: portfolio-lead
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: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
image: https://og.cside.com/?title=cside%2C%20Client-Side%20Security%20%26%20Browser%20Fraud%20Prevention
tags:
- Company
- Security
- Client-Side Security
- Application Security
- Fraud Prevention
- PCI DSS Compliance
- Device Fingerprinting
- Bot Detection
- Web Security
- Script Monitoring
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/c-side-plans-pricing.yml
- url: https://cside.com/blog/rss.xml
  type: BlogRSS
- type: Website
  url: https://cside.com
- type: DeveloperPortal
  url: https://docs.cside.com
- type: Documentation
  url: https://docs.cside.com
- type: GettingStarted
  url: https://docs.cside.com/quickstart
- type: Blog
  url: https://cside.com/blog
- type: Pricing
  url: https://cside.com/pricing
- type: SignUp
  url: https://dash.cside.com/auth/signup
- type: PrivacyPolicy
  url: https://cside.com/privacy-policy
- type: HelpCenter
  url: https://cside.com/faq
- type: GitHubOrganization
  url: https://github.com/client-side-dev
- type: MCPServer
  url: mcp/c-side-mcp.yml
- type: LLMsTxt
  url: llms/c-side-llms.txt
- type: Packages
  url: packages/c-side-packages.yml
- type: SDKs
  url: packages/c-side-packages.yml
- type: CLI
  url: cli/c-side-cli.yml
- type: Components
  url: components/c-side-components.yml
- type: WellKnown
  url: well-known/c-side-well-known.yml
- type: SecurityTxt
  url: well-known/c-side-security.txt
- type: Webhooks
  url: asyncapi/c-side-webhooks.yml
- type: ChangeLog
  url: changelog/c-side-changelog.yml
- type: Lifecycle
  url: lifecycle/c-side-lifecycle.yml
- type: StatusPage
  url: https://status.cside.com
- type: Conformance
  url: conformance/c-side-conformance.yml
- type: Compliance
  url: https://trust.cside.com
- type: TrustCenter
  url: security/c-side-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/c-side-vulnerability-disclosure.yml
- type: Security
  url: https://cside.com/security
- type: DomainSecurity
  url: security/c-side-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence