Lasso Security website screenshot

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 2 APIs on the APIs.io network: Classify API and Masking API. Tagged areas include AI, 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
39.8/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumSelf serve⚡ Free to try
2 APIs
AILLMGenAI SecurityPrompt InjectionGuardrailsMCP

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 39.8/100 · thin
Contract Quality 15.9 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. 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. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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.

Lasso Security Masking API

The Masking API from Lasso Security — 1 operation(s) for masking.

Open Collections 1

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

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

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
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
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.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/lasso-security.png
tags:
- AI
- LLM
- GenAI Security
- Prompt Injection
- Guardrails
- MCP
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.19'
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
- aid: lasso-security:lasso-security-masking-api
  name: Lasso Security Masking API
  description: The Masking API from Lasso Security — 1 operation(s) for masking.
  humanURL: https://www.lasso.security/platform/lasso-for-applications
  baseURL: https://server.lasso.security/gateway/v3
  tags:
  - Masking
  properties:
  - type: OpenAPI
    url: openapi/lasso-security-masking-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