Contentladder Marketing

Contentladder Marketing, operating as Serpent API, provides developers with affordable, high‑volume search engine results (SERP) and related data across Google, Bing, Yahoo, DuckDuckGo, and Brave. They offer transparent per‑unit pricing, a free tier, and a suite of APIs covering web search, image, video, news, shopping, maps, and social media data. The team of marketers built the service to reduce costs for data‑driven teams and supports AI‑enhanced ranking and custom data pipelines.

Contentladder Marketing is listed with 11 APIs on the APIs.io network, including AI API, Bulk API, Contentladder Marketing API, and 8 more. Tagged areas include Company, SERP, Search, and Data.

The Contentladder Marketing catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Contentladder Marketing’s developer surface includes authentication, sandbox, getting-started guide, documentation, pricing, support, engineering blog, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.5/100 emerging ▼ -9.0 Agent 22/100 agent aware Heartbeat 90/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

11 APIs

Company SERP Search Data

Kin Score

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

Composite quality — 25.5/100 · emerging

Contract Quality 4.7 / 19

Developer Ergonomics 4.5 / 15

Access Clarity 3.4 / 15

Operational Transparency 0.3 / 10

Contract Governance 1.8 / 9

Discoverability 4.6 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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 0 / 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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
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
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):

Contract Quality scores 24.8 — up to +18.8 composite points
Access Clarity scores 22.4 — up to +15.5 composite points
Developer Ergonomics scores 29.8 — up to +14.0 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/apiserpent/apis.yml: open an issue on github.com/api-evangelist/apiserpent 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 11

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

Serpent API

Provides search engine results and related data across multiple engines via REST endpoints.

Contentladder Marketing AI API

The Ai API from Contentladder Marketing — 2 operation(s) for ai.

Contentladder Marketing Bulk API

The Bulk API from Contentladder Marketing — 1 operation(s) for bulk.

Contentladder Marketing Contentladder Marketing API

The Contentladder Marketing API API from Contentladder Marketing — 1 operation(s) for contentladder marketing api.

Contentladder Marketing Profile API

The Profile API from Contentladder Marketing — 1 operation(s) for profile.

Contentladder Marketing Reddit API

The Reddit API from Contentladder Marketing — 1 operation(s) for reddit.

Contentladder Marketing Search API

The Search API from Contentladder Marketing — 1 operation(s) for search.

Contentladder Marketing Social API

The Social API from Contentladder Marketing — 1 operation(s) for social.

Contentladder Marketing Tiktok API

The Tiktok API from Contentladder Marketing — 1 operation(s) for tiktok.

Contentladder Marketing X API

The X API from Contentladder Marketing — 1 operation(s) for x.

Contentladder Marketing Linked In API

The Linked In API from Contentladder Marketing — 2 operation(s) for linked in.

Scroll for all 11

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Apiserpent Context

12 classes · 29 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Contentladder Marketing API Rules

12 rules · 11 errors 1 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

GetApiAiRankChatgptResponse

4 properties

JSON SCHEMA

GetApiAiRankResponse

4 properties

JSON SCHEMA

GetApiApiidProfileResponse

2 properties

JSON SCHEMA

GetApiSearchQuickResponse

10 properties

JSON SCHEMA

GetApiTiktokTiktokidResponse

10 properties

JSON SCHEMA

GetApiXXidResponse

2 properties

JSON SCHEMA

Security Posture 2

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

Apiserpent Authentication

1 scheme

SECURITY

Apiserpent Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Login

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

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

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: apiserpent
name: Contentladder Marketing
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: unreadable
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://apiserpent.com/og-images/index.jpg
description: Contentladder Marketing, operating as Serpent API, provides developers with affordable, high‑volume search engine
  results (SERP) and related data across Google, Bing, Yahoo, DuckDuckGo, and Brave. They offer transparent per‑unit pricing,
  a free tier, and a suite of APIs covering web search, image, video, news, shopping, maps, and social media data. The team
  of marketers built the service to reduce costs for data‑driven teams and supports AI‑enhanced ranking and custom data pipelines.
url: https://raw.githubusercontent.com/api-evangelist/apiserpent/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-16 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-15'
modified: '2026-10-15'
tags:
- Company
- SERP
- Search
- Data
tags_raw:
- Company
- SERP
- API
- Search
- Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/apiserpent-rules.yml
- type: JSONLD
  url: json-ld/apiserpent-context.jsonld
- type: Vocabulary
  url: vocabulary/apiserpent-vocabulary.yml
- type: DataModel
  url: data-model/apiserpent-data-model.yml
- type: Conventions
  url: conventions/apiserpent-conventions.yml
- type: Authentication
  url: authentication/apiserpent-authentication.yml
- type: Conformance
  url: conformance/apiserpent-conformance.yml
- type: LLMsTxt
  url: llms/apiserpent-llms.txt
- type: Hosts
  url: hosts/apiserpent-hosts.yml
- type: Vendors
  url: vendors/apiserpent-vendors.yml
- type: Sandbox
  url: https://apiserpent.com/playground
- type: Login
  url: https://apiserpent.com/login
- type: GitHubOrganization
  url: https://github.com/apiserpent
- type: GettingStarted
  url: https://apiserpent.com/blog/google-maps-api-getting-started
- type: DomainSecurity
  url: security/apiserpent-domain-security.yml
- type: Website
  url: https://apiserpent.com/
- type: Documentation
  url: https://apiserpent.com/docs
- type: Pricing
  url: https://apiserpent.com/pricing
- type: TermsOfService
  url: https://apiserpent.com/terms
- type: PrivacyPolicy
  url: https://apiserpent.com/privacy
- type: Support
  url: https://apiserpent.com/contact
- type: Blog
  url: https://apiserpent.com/blog
apis:
- name: Serpent API
  description: Provides search engine results and related data across multiple engines via REST endpoints.
  humanURL: https://apiserpent.com/docs
  aid: apiserpent:serpent-api
- aid: apiserpent:apiserpent-ai-api
  name: Contentladder Marketing AI API
  description: The Ai API from Contentladder Marketing — 2 operation(s) for ai.
  humanURL: https://apiserpent.com/docs
  tags:
  - Artificial Intelligence
  tags_raw:
  - Ai
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-ai-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-bulk-api
  name: Contentladder Marketing Bulk API
  description: The Bulk API from Contentladder Marketing — 1 operation(s) for bulk.
  humanURL: https://apiserpent.com/docs
  tags:
  - Bulk
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-bulk-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-contentladder-marketing-api-api
  name: Contentladder Marketing Contentladder Marketing API
  description: The Contentladder Marketing API API from Contentladder Marketing — 1 operation(s) for contentladder marketing
    api.
  humanURL: https://apiserpent.com/docs
  tags:
  - Contentladder Marketing API
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-contentladder-marketing-api-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-profile-api
  name: Contentladder Marketing Profile API
  description: The Profile API from Contentladder Marketing — 1 operation(s) for profile.
  humanURL: https://apiserpent.com/docs
  tags:
  - Profiles
  tags_raw:
  - Profile
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-profile-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-reddit-api
  name: Contentladder Marketing Reddit API
  description: The Reddit API from Contentladder Marketing — 1 operation(s) for reddit.
  humanURL: https://apiserpent.com/docs
  tags:
  - Reddit
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-reddit-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-search-api
  name: Contentladder Marketing Search API
  description: The Search API from Contentladder Marketing — 1 operation(s) for search.
  humanURL: https://apiserpent.com/docs
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-search-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-social-api
  name: Contentladder Marketing Social API
  description: The Social API from Contentladder Marketing — 1 operation(s) for social.
  humanURL: https://apiserpent.com/docs
  tags:
  - Social
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-social-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-tiktok-api
  name: Contentladder Marketing Tiktok API
  description: The Tiktok API from Contentladder Marketing — 1 operation(s) for tiktok.
  humanURL: https://apiserpent.com/docs
  tags:
  - TikTok
  tags_raw:
  - Tiktok
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-tiktok-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-x-api
  name: Contentladder Marketing X API
  description: The X API from Contentladder Marketing — 1 operation(s) for x.
  humanURL: https://apiserpent.com/docs
  tags:
  - X
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-x-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
- aid: apiserpent:apiserpent-linked-in-api
  name: Contentladder Marketing Linked In API
  description: The Linked In API from Contentladder Marketing — 2 operation(s) for linked in.
  humanURL: https://apiserpent.com/docs
  tags:
  - LinkedIn
  tags_raw:
  - Linked In
  properties:
  - type: OpenAPI
    url: openapi/apiserpent-linked-in-api-openapi.yml
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-search-quick-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-tiktok-tiktokid-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-chatgpt-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-ai-rank-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-apiid-profile-response-schema.json
  - type: JSONSchema
    url: json-schema/apiserpent-get-api-xxid-response-schema.json
x-coverage:
  state: unreadable
  reason: js-rendered-docs
  detail: Documentation pages are rendered with JavaScript and provide no machine‑readable OpenAPI or other contract.
  evidence:
  - url: https://apiserpent.com/docs
    status: 200
  checked: '2026-10-16'
x-enrichment:
  date: '2026-10-16'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Contentladder Marketing API — frequently asked questions

Does Contentladder Marketing have an API?

Yes. APIs.io lists 11 APIs from Contentladder Marketing, including Serpent API, Contentladder Marketing AI API and Contentladder Marketing Bulk API, and 8 more.

Is there an OpenAPI specification for the Contentladder Marketing API?

Yes. APIs.io indexes 10 OpenAPI specifications for Contentladder Marketing, each linked for download from this page.

How do I authenticate with the Contentladder Marketing API?

Contentladder Marketing uses bearer-token authentication (1 scheme). The details are profiled on APIs.io as Apiserpent Authentication.

Is the Contentladder Marketing API ready for AI agents?

Contentladder Marketing has a Kin Score of 25.5 out of 100 (emerging) and an Agent Readiness score of 22.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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