Agent Preflight

Agent Preflight provides a pre‑execution decision service for autonomous agents, allowing them to check planned tool calls before spending resources. It returns one of allow, block, reuse, defer, or advise, and never executes the destination tool itself. The platform aims to improve safety and cost‑efficiency for AI‑driven workflows, offering clear guidance on whether a tool call should proceed.

Agent Preflight publishes 2 API contracts indexed on the APIs.io network, including Api API, and 1 more. Tagged areas include Agents, Preflight, Tool, and Decisions.

The Agent Preflight catalog on APIs.io includes 1 Spectral governance ruleset.

Agent Preflight’s developer surface includes documentation, API reference, getting-started guide, and 9 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

18.8/100 emerging ▬ flat Agent 19/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract

Agents Preflight Tool Decisions

Kin Score

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

Composite quality — 18.8/100 · emerging

Contract Quality 7.7 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 1.9 / 10

Discoverability 4.6 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 18 / 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 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 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 0 / 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):

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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

10 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 14.3 — up to +17.1 composite points
Contract Quality scores 36.3 — up to +15.9 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/agent-preflight-com/apis.yml: open an issue on github.com/api-evangelist/agent-preflight-com 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.

OpenAPI

measured — observed by APIs.io (published)

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Agent Preflight API

Preflight decision service API providing allow/block/etc responses.

Agent Preflight Api API

V0.3: V0.1 validates a proposed HTTP body against JSON Schema. POST /v0.2/preflight/tool-call returns allow|block|reuse|defer|advise for a budgeted tool call without executing i...

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Agent Preflight API Rules

7 rules · 5 errors 1 warnings 1 info

SPECTRAL

Security Posture 1

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

Agent Preflight Com Domain Security

TLSv1.3

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Conformance

Conformance

ErrorCatalog

ErrorCatalog

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: agent-preflight-com
name: Agent Preflight
description: Agent Preflight provides a pre‑execution decision service for autonomous agents, allowing them to check planned
  tool calls before spending resources. It returns one of allow, block, reuse, defer, or advise, and never executes the destination
  tool itself. The platform aims to improve safety and cost‑efficiency for AI‑driven workflows, offering clear guidance on
  whether a tool call should proceed.
url: https://artifacts.apis.io/agent-preflight-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Agents
- Preflight
- Tool
- Decisions
tags_raw:
- Agent
- Preflight
- API
- Tool
- Decision
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/agent-preflight-com-rules.yml
- type: Conformance
  url: conformance/agent-preflight-com-conformance.yml
- type: ErrorCatalog
  url: errors/agent-preflight-com-problem-types.yml
- type: LLMsTxt
  url: llms/agent-preflight-com-llms.txt
- type: WellKnown
  url: well-known/agent-preflight-com-well-known.yml
- type: Hosts
  url: hosts/agent-preflight-com-hosts.yml
- type: Vendors
  url: vendors/agent-preflight-com-vendors.yml
- type: DomainSecurity
  url: security/agent-preflight-com-domain-security.yml
- type: Website
  url: https://agent-preflight.com/
- type: Documentation
  url: https://agent-preflight.com/docs
- type: APIReference
  url: https://api.agent-preflight.com/openapi.json
- type: GettingStarted
  url: https://agent-preflight.com/docs
apis:
- name: Agent Preflight API
  description: Preflight decision service API providing allow/block/etc responses.
  humanURL: https://agent-preflight.com/docs
  baseURL: https://api.agent-preflight.com
  aid: agent-preflight-com:agent-preflight-api
- aid: agent-preflight-com:agent-preflight-api-api
  name: Agent Preflight Api API
  description: 'V0.3: V0.1 validates a proposed HTTP body against JSON Schema. POST /v0.2/preflight/tool-call returns allow|block|reuse|defer|advise

    for a budgeted tool call without executing it. Production charges $0.002 USDC per HTTP POST on Base mainnet (eip155:8453)
    via x402 when payment

    env is enabled. MCP and'
  humanURL: https://agent-preflight.com/docs
  baseURL: https://api.agent-preflight.com
  properties:
  - type: OpenAPI
    url: openapi/_original/agent-preflight-com-api-openapi.json
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 15
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Agent Preflight API — frequently asked questions

Does Agent Preflight have an API?

Yes. APIs.io lists 2 APIs from Agent Preflight, including Agent Preflight API and Agent Preflight Api API.

Is there an OpenAPI specification for the Agent Preflight API?

Yes. APIs.io indexes 1 OpenAPI specification for Agent Preflight, each linked for download from this page.

Is the Agent Preflight API ready for AI agents?

Agent Preflight has a Kin Score of 18.8 out of 100 (emerging) and an Agent Readiness score of 18.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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