Lasso Security

Lasso Security is a GenAI security platform that protects every LLM and AI agent touchpoint. Its Deputy gateway inspects LLM and MCP traffic in real time, and the Classify / Threat Detection API scores prompts and completions for prompt injection, jailbreaks, PII, and harmful content, returning structured BLOCK / WARN / AUTO_MASKING findings.

Lasso Security publishes 1 API on the APIs.io network: Classify API. Tagged areas include Artificial Intelligence, LLM, GenAI Security, Prompt Injection, and Guardrails.

Lasso Security’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.4/100 developing ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Artificial Intelligence LLMGenAI SecurityPrompt Injection Guardrails MCP

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 39.4/100 · developing

Contract Quality 13.0 / 23

Developer Ergonomics 5.8 / 18

Access Clarity 7.1 / 18

Operational Transparency 4.0 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

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/lasso-security: 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 →

APIs 1

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

Lasso Security Classify API

The Classify API from Lasso Security — 2 operation(s) for classify.

Open Collections 4

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Lasso Security / Threat Detection Classify API

OPEN COLLECTION

Lasso Security / Threat Detection Classify Masking API

OPEN COLLECTION

Lasso Security Classify / Threat Detection API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Lasso Security Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Lasso Security Rate Limits

3 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Lasso Security Finops

FINOPS

Security Posture 2

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

Lasso Security Authentication

apiKey · 1 scheme

SECURITY

Lasso Security Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Lasso Security Agentic Access

2 operations · 2 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: lasso-security
url: https://raw.githubusercontent.com/api-evangelist/lasso-security/refs/heads/main/apis.yml
name: Lasso Security
kind: company
description: Lasso Security is a GenAI security platform that protects every LLM and AI agent touchpoint. Its Deputy gateway
  inspects LLM and MCP traffic in real time, and the Classify / Threat Detection API scores prompts and completions for prompt
  injection, jailbreaks, PII, and harmful content, returning structured BLOCK / WARN / AUTO_MASKING findings.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/lasso-security.png
tags:
- Artificial Intelligence
- LLM
- GenAI Security
- Prompt Injection
- Guardrails
- MCP
tags_raw:
- AI
- LLM
- GenAI Security
- Prompt Injection
- Guardrails
- MCP
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: lasso-security:lasso-security-classify-api
  name: Lasso Security Classify API
  description: The Classify API from Lasso Security — 2 operation(s) for classify.
  humanURL: https://www.lasso.security/platform/lasso-for-applications
  baseURL: https://server.lasso.security/gateway/v3
  tags:
  - Classify
  properties:
  - type: OpenAPI
    url: openapi/lasso-security-classify-api-openapi.yml
  - type: Documentation
    url: https://www.lasso.security/platform/lasso-for-applications
  - type: APIReference
    url: https://docs.litellm.ai/docs/proxy/guardrails/lasso_security
  - type: PostmanCollection
    url: collections/lasso-security.postman_collection.json
  - type: OpenCollection
    url: collections/lasso-security.opencollection.json
  - type: Documentation
    url: https://github.com/lasso-security/mcp-gateway
  - type: Documentation
    url: https://www.lasso.security/resources/lasso-releases-first-open-source-security-gateway-for-mcp
common:
- type: AgenticAccess
  url: agentic-access/lasso-security-agentic-access.yml
- type: DomainSecurity
  url: security/lasso-security-domain-security.yml
- type: Authentication
  url: authentication/lasso-security-authentication.yml
- type: GitHubOrganization
  url: https://github.com/lasso-security
- type: LinkedIn
  url: https://www.linkedin.com/company/lasso-security
- type: Website
  url: https://www.lasso.security/
- type: Documentation
  url: https://www.lasso.security/platform/lasso-for-applications
- type: Plans
  url: plans/lasso-security-plans-pricing.yml
- type: RateLimits
  url: rate-limits/lasso-security-rate-limits.yml
- type: FinOps
  url: finops/lasso-security-finops.yml
- type: Blog
  url: https://www.lasso.security/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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