Puddle

Puddle is a technical-interview platform for evaluating software-engineering candidates in real-world, AI-enabled conditions. Candidates work through live coding assessments inside a sandboxed environment with an integrated IDE and terminal, and are free to use modern AI tools (such as Claude Code) during the session. Puddle captures detailed signals about how a candidate approaches a problem across structured phases (problem discussion, architecture, implementation, and debrief) and produces an outcome report with confidence scores, focus and iteration-pace metrics, and hiring recommendations. It is sold as a B2B SaaS recruitment-assessment tool via demo and early-access waitlist. Puddle was surfaced as an a16z portfolio company and added to the API Evangelist network. As of this pass Puddle publishes no public API, developer documentation, SDK, or OpenAPI surface; the profile below captures its verifiable public web and security presence.

Puddle is profiled on the APIs.io network. Tagged areas include Company, Technical Interviews, Hiring, Developer Assessment, and Recruiting.

🌐 Visit website 📡 Profile data on GitHub

7.9/100 minimal ▬ flat Agent 12/100 agent aware Front door AI 4/6 moderate saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessApproval

0 APIs 1 MCP Servers

Company Technical Interviews HiringDeveloper AssessmentRecruiting Artificial Intelligence Coding Assessment

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 7.9/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.0 / 17

Access Clarity 1.1 / 17

Operational Transparency 1.2 / 11

Contract Governance 0.0 / 10

Discoverability 5.0 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 12/100 · agent aware

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 5 / 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
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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 0.0 — up to +20.0 composite points
Access Clarity scores 6.6 — up to +18.7 composite points

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/puddle/apis.yml: open an issue on github.com/api-evangelist/puddle 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 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

MCP Servers 1

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

Puddle MCP Server

Remote MCP server at app.usepuddle.com over HTTP.

MCP SERVER

Security Posture 2

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

Puddle Domain Security

TLSv1.3 · DMARC

SECURITY

Puddle Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Access & Security 4

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

SecurityTxt

SecurityTxt

Security

Security

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: puddle
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: approval
  trial: false
  try_now: false
  public: false
  label: Requires approval
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/puddle.png
name: Puddle
description: Puddle is a technical-interview platform for evaluating software-engineering candidates in real-world, AI-enabled
  conditions. Candidates work through live coding assessments inside a sandboxed environment with an integrated IDE and terminal,
  and are free to use modern AI tools (such as Claude Code) during the session. Puddle captures detailed signals about how
  a candidate approaches a problem across structured phases (problem discussion, architecture, implementation, and debrief)
  and produces an outcome report with confidence scores, focus and iteration-pace metrics, and hiring recommendations. It
  is sold as a B2B SaaS recruitment-assessment tool via demo and early-access waitlist. Puddle was surfaced as an a16z portfolio
  company and added to the API Evangelist network. As of this pass Puddle publishes no public API, developer documentation,
  SDK, or OpenAPI surface; the profile below captures its verifiable public web and security presence.
url: https://raw.githubusercontent.com/api-evangelist/puddle/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Technical Interviews
- Hiring
- Developer Assessment
- Recruiting
- Artificial Intelligence
- Coding Assessment
tags_raw:
- Company
- Technical Interviews
- Hiring
- Developer Assessment
- Recruiting
- AI
- Coding Assessment
apis: []
common:
- type: VulnerabilityDisclosure
  url: security/puddle-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/puddle-domain-security.yml
- type: Website
  url: https://usepuddle.com
- type: SecurityTxt
  url: well-known/puddle-security.txt
- type: Security
  url: well-known/puddle-security.txt
- type: LLMsTxt
  url: llms/puddle-llms.txt
- type: WellKnown
  url: well-known/puddle-well-known.yml
- type: Login
  url: https://usepuddle.com/login
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-contacts:
- FN: Prakul Singh
  email: prakul@usepuddle.com
  x-twitter: prakpuddle
  x-role: security-contact
x-aliases:
- https://trypuddle.com
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 5
  pass: local-v1

Puddle API — frequently asked questions

Does Puddle have an MCP server?

Yes. APIs.io lists 1 MCP server for Puddle: Remote MCP server at app.usepuddle.com over HTTP.

Is the Puddle API ready for AI agents?

Puddle has a Kin Score of 7.9 out of 100 (minimal) and an Agent Readiness score of 12.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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.

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Every operation they expose

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How their score was established

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