depthfirst website screenshot

depthfirst

depthfirst is an applied AI lab building an autonomous application security platform that protects software from design through production. Its General Security Intelligence platform builds context across a company's code, infrastructure, and business logic to detect complex vulnerabilities, cut false positives, and generate merge-ready fixes. Product surfaces include a code scanner, dependency firewall, secrets detection, supply-chain mapping, and agentic pentesting, alongside in-house security models such as dfs-mini1. Backed by Accel, Meritech Capital, Forerunner Ventures, and The House Fund, depthfirst works with companies including ClickUp, Lovable, Supabase, incident.io, and Moveworks.

depthfirst is profiled on the APIs.io network. Tagged areas include Company, Security, Application Security, Cybersecurity, and DevSecOps.

depthfirst’s developer surface includes engineering blog and 9 more developer resources.

🌐 Visit website📡 Profile data on GitHub
14.8/100 emerging ▬ flat Agent 0/100 human only Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
0 APIs
CompanySecurityApplication SecurityCybersecurityDevSecOpsArtificial IntelligenceAI AgentsVulnerability ManagementSupply Chain Security

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
Composite quality — 14.8/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 0.4 / 17
Access Clarity 6.0 / 17
Operational Transparency 1.7 / 11
Contract Governance 0.0 / 10
Discoverability 4.1 / 9
Regulatory Posture 2.6 / 15
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 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
Pagination 5 / 5
Distinct Operations 3 / 3
MCP Tool Quality 6 / 6
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
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.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
13 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.
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 the provider profile at artifacts.apis.io/depthfirst/apis.yml: open an issue on github.com/api-evangelist/depthfirst to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

DevSecOps
tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

depthfirst

SLA

Security Posture 1

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

Depthfirst Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login
Login

Access & Security 2

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage
StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 4

The organization behind the API

Website
Website
 Blog
Blog
 LinkedIn
LinkedIn
 Twitter
Twitter

Source (apis.yml)

apis.yml Raw ↑ 
aid: depthfirst
name: depthfirst
description: depthfirst is an applied AI lab building an autonomous application security platform that protects software from
  design through production. Its General Security Intelligence platform builds context across a company's code, infrastructure,
  and business logic to detect complex vulnerabilities, cut false positives, and generate merge-ready fixes. Product surfaces
  include a code scanner, dependency firewall, secrets detection, supply-chain mapping, and agentic pentesting, alongside
  in-house security models such as dfs-mini1. Backed by Accel, Meritech Capital, Forerunner Ventures, and The House Fund,
  depthfirst works with companies including ClickUp, Lovable, Supabase, incident.io, and Moveworks.
url: https://raw.githubusercontent.com/api-evangelist/depthfirst/refs/heads/main/apis.yml
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:
  - security
  generated: '2026-11-06'
  method: derived
image: https://depthfirst.com/images/depthfirst-og.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
- forerunner-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Security
- Application Security
- Cybersecurity
- DevSecOps
- Artificial Intelligence
- AI Agents
- Vulnerability Management
- Supply Chain Security
tags_raw:
- Company
- Security
- Application Security
- Cybersecurity
- DevSecOps
- Artificial Intelligence
- Agentic AI
- Vulnerability Management
- Supply Chain Security
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://depthfirst.com/
- type: Blog
  url: https://depthfirst.com/blog
- type: StatusPage
  url: https://status.depthfirst.com/
- type: TrustCenter
  url: https://trust.depthfirst.com/
- type: Login
  url: https://app.depthfirst.com/
- type: TermsOfService
  url: https://depthfirst.com/legal/terms-of-service
- type: PrivacyPolicy
  url: https://depthfirst.com/legal/privacy-policy
- type: LinkedIn
  url: https://www.linkedin.com/company/depthfirst/
- type: Twitter
  url: https://x.com/depthfirstlabs
- type: DomainSecurity
  url: security/depthfirst-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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