Z League

Z League is an a16z-backed startup that operates the MEGA platform (gomega.ai) — a suite of AI marketing agents that autonomously manage SEO, paid advertising, and website/growth optimization for businesses at a fraction of traditional agency cost. MEGA also ships a built-in CRM, and exposes the MEGA public CRM Lead API: a server-to-server REST API to pull/search leads with cursor pagination, push leads one-at-a-time or in bulk (up to 500) with idempotency and email/phone de-duplication, and register HMAC-signed `lead.created` webhooks. Authentication is an admin-issued, customer-locked, scoped Personal Access Token (Bearer `mega_...`) plus an `x-customer-id` header. The API is documented with an OpenAPI 3.1 spec and a Mintlify developer portal published from the company's public GitHub org (github.com/zleague).

Z League publishes 2 APIs on the APIs.io network: Leads API and Webhooks API. Tagged areas include Company, CRM, Leads, Marketing, and AI Agents.

The Z League catalog on APIs.io includes 2 event-driven AsyncAPI specifications.

Z League’s developer surface includes documentation, API reference, getting-started guide, engineering blog, pricing, signup flow, support, and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub
47.3/100 developing ▬ flat Agent 49/100 agent ready Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
2 APIs
CompanyCRMLeadsMarketingAI AgentsSEOAdvertisingWebhooksGaming

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 47.3/100 · developing
Contract Quality 16.8 / 25
Developer Ergonomics 9.6 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 49/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
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 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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/z-league: 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.

Z League Leads API

The Leads API from Z League — 2 operation(s) for leads.

Z League Webhooks API

The Webhooks API from Z League — 2 operation(s) for webhooks.

Arazzo Workflows 3

Multi-step API workflows described with the Arazzo specification.

_Index

ARAZZO

MEGA CRM — capture lead and register webhook

Register a lead.created webhook, then create a lead. Real inserts fire the webhook so your endpoint is notified. Uses an Idempotency-Key so the create is retry-safe.

ARAZZO

MEGA CRM — incremental lead sync

Poll the MEGA CRM for leads with stable keyset cursor pagination: fetch the first page sorted by updated_at ascending, then follow next_cursor to fetch the next page.

ARAZZO

Rate Limits 1

Documented rate limits and quota policies.

Z League Rate Limits

0 limits

RATE LIMITS

Event Specifications 2

AsyncAPI definitions for this provider's event-driven and streaming APIs.

MEGA Public CRM Lead Webhooks

Outbound webhook event surface for the MEGA public CRM Lead API. MEGA POSTs a signed `lead.created` event to a subscriber-registered public HTTPS endpoint whenever a genuine new...

ASYNCAPI

Z League Lead Webhooks

ASYNCAPI

Security Posture 2

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

Z League Authentication

http · 1 scheme

SECURITY

Z League Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Z League Agentic Access

7 operations · 5 acting

7 operations · 5 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Login
Login

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
 AgentSkill
AgentSkill

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Lifecycle
Lifecycle
 Arazzo
Arazzo
 Arazzo
Arazzo

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support
Support
 ChangeLog
ChangeLog
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: z-league
name: Z League
description: 'Z League is an a16z-backed startup that operates the MEGA platform (gomega.ai) — a suite of AI marketing agents
  that autonomously manage SEO, paid advertising, and website/growth optimization for businesses at a fraction of traditional
  agency cost. MEGA also ships a built-in CRM, and exposes the MEGA public CRM Lead API: a server-to-server REST API to pull/search
  leads with cursor pagination, push leads one-at-a-time or in bulk (up to 500) with idempotency and email/phone de-duplication,
  and register HMAC-signed `lead.created` webhooks. Authentication is an admin-issued, customer-locked, scoped Personal Access
  Token (Bearer `mega_...`) plus an `x-customer-id` header. The API is documented with an OpenAPI 3.1 spec and a Mintlify
  developer portal published from the company''s public GitHub org (github.com/zleague).'
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://raw.githubusercontent.com/api-evangelist/z-league/refs/heads/main/openapi/z-league-crm-lead-openapi.json
url: https://raw.githubusercontent.com/api-evangelist/z-league/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-operating-name: MEGA (gomega.ai)
x-tier: enriched
x-tier-reason: real-openapi-and-docs
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- CRM
- Leads
- Marketing
- AI Agents
- SEO
- Advertising
- Webhooks
- Gaming
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 25
  pass: local-v1
apis:
- aid: z-league:z-league-leads-api
  name: Z League Leads API
  description: The Leads API from Z League — 2 operation(s) for leads.
  humanURL: https://docs.gomega.ai
  baseURL: https://app.gomega.ai
  tags:
  - Leads
  properties:
  - type: OpenAPI
    url: openapi/z-league-leads-api-openapi.yml
  - type: APIReference
    url: https://docs.gomega.ai
  - type: Documentation
    url: https://docs.gomega.ai
  - type: GettingStarted
    url: https://docs.gomega.ai/quickstart
  - type: Authentication
    url: authentication/z-league-authentication.yml
  - type: Conventions
    url: conventions/z-league-conventions.yml
  - type: Idempotency
    url: conventions/z-league-conventions.yml
  - type: ErrorCatalog
    url: errors/z-league-problem-types.yml
  - type: DataModel
    url: data-model/z-league-data-model.yml
  - type: Conformance
    url: conformance/z-league-conformance.yml
  - type: AsyncAPI
    url: asyncapi/z-league-lead-webhooks-asyncapi.yml
  - type: Webhooks
    url: asyncapi/z-league-lead-webhooks.yml
  - type: AgenticAccess
    url: agentic-access/z-league-agentic-access.yml
- aid: z-league:z-league-webhooks-api
  name: Z League Webhooks API
  description: The Webhooks API from Z League — 2 operation(s) for webhooks.
  humanURL: https://docs.gomega.ai
  baseURL: https://app.gomega.ai
  tags:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/z-league-webhooks-api-openapi.yml
  - type: APIReference
    url: https://docs.gomega.ai
  - type: Documentation
    url: https://docs.gomega.ai
  - type: GettingStarted
    url: https://docs.gomega.ai/quickstart
  - type: Authentication
    url: authentication/z-league-authentication.yml
  - type: Conventions
    url: conventions/z-league-conventions.yml
  - type: Idempotency
    url: conventions/z-league-conventions.yml
  - type: ErrorCatalog
    url: errors/z-league-problem-types.yml
  - type: DataModel
    url: data-model/z-league-data-model.yml
  - type: Conformance
    url: conformance/z-league-conformance.yml
  - type: AsyncAPI
    url: asyncapi/z-league-lead-webhooks-asyncapi.yml
  - type: Webhooks
    url: asyncapi/z-league-lead-webhooks.yml
  - type: AgenticAccess
    url: agentic-access/z-league-agentic-access.yml
common:
- type: DeveloperPortal
  url: https://docs.gomega.ai
- type: Documentation
  url: https://docs.gomega.ai
- type: APIReference
  url: https://docs.gomega.ai
- type: GettingStarted
  url: https://docs.gomega.ai/quickstart
- type: Website
  url: https://www.gomega.ai
- type: Blog
  url: https://www.gomega.ai/blog/
- type: Pricing
  url: https://www.gomega.ai/pricing
- type: SignUp
  url: https://www.gomega.ai/megapricing
- type: Login
  url: https://app.gomega.ai/
- type: TermsOfService
  url: https://www.gomega.ai/legal/terms-of-use
- type: PrivacyPolicy
  url: https://www.gomega.ai/legal/privacy-policy
- type: Support
  url: mailto:support@gomega.ai
- type: GitHubOrganization
  url: https://github.com/zleague
- type: ChangeLog
  url: changelog/z-league-changelog.yml
- type: Lifecycle
  url: lifecycle/z-league-lifecycle.yml
- type: RateLimits
  url: rate-limits/z-league-rate-limits.yml
- type: LLMsTxt
  url: llms/z-league-llms.txt
- type: DomainSecurity
  url: security/z-league-domain-security.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Arazzo
  name: Incremental lead sync
  url: arazzo/z-league-incremental-lead-sync.yml
- type: Arazzo
  name: Capture lead and register webhook
  url: arazzo/z-league-capture-and-notify.yml