powerline-ai

Powerline builds AI-accessible APIs that enable agents to interact with real-world services. Their flagship product, Inbox Preview, renders HTML emails across Gmail, Outlook, and Yahoo Mail, providing screenshots without requiring sign‑up. The company focuses on bridging AI models with operational tools, offering free utilities like domain and email header checks. Powerline aims to simplify AI integration for developers and enterprises.

powerline-ai is listed with 1 API on the APIs.io network. Tagged areas include Company, AI, APIs, Automation, and Email.

powerline-ai’s developer surface includes getting-started guide and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

15.5/100 emerging Agent 12/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API 1 MCP Servers

CompanyAIAPIsAutomation Email Productivity

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 15.5/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.1 / 17

Access Clarity 1.8 / 17

Operational Transparency 2.3 / 11

Contract Governance 0.0 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.7 / 15

Agent readiness — 12/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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

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):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

9 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 18.3 — up to +16.3 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/powerline-ai/apis.yml: open an issue on github.com/api-evangelist/powerline-ai 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 →

APIs 1

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

Powerline MCP API

Powerline provides AI-accessible email and DNS utilities via an MCP JSON‑RPC endpoint. Tools include domain health checks, DNS record validation, blacklist lookup, email header ...

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

powerline-ai MCP Server

Remote MCP server at powerline.ai.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Powerline Ai Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Powerline Ai Rate Limits

1 limits

RATE LIMITS

Security Posture 2

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

Powerline Ai Authentication

0 schemes

SECURITY

Powerline Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Powerline Ai Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

MCPServer

MCPServer

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

ErrorCatalog

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

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: powerline-ai
name: powerline-ai
description: Powerline builds AI-accessible APIs that enable agents to interact with real-world services. Their flagship product,
  Inbox Preview, renders HTML emails across Gmail, Outlook, and Yahoo Mail, providing screenshots without requiring sign‑up.
  The company focuses on bridging AI models with operational tools, offering free utilities like domain and email header checks.
  Powerline aims to simplify AI integration for developers and enterprises.
url: https://artifacts.apis.io/powerline-ai/apis.yml
image: https://powerline.ai/og/powerline.png
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
tags:
- Company
- AI
- APIs
- Automation
- Email
- Productivity
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/powerline-ai-rate-limits.yml
- type: AgentSkill
  url: skills/_index.yml
- type: ErrorCatalog
  url: errors/powerline-ai-problem-types.yml
- type: LLMsTxt
  url: llms/powerline-ai-llms.txt
- type: ToolCrosswalk
  url: mcp/powerline-ai-tool-crosswalk.yml
- type: MCPServer
  url: mcp/powerline-ai-mcp.yml
- type: Hosts
  url: hosts/powerline-ai-hosts.yml
- type: Vendors
  url: vendors/powerline-ai-vendors.yml
- type: DomainSecurity
  url: security/powerline-ai-domain-security.yml
- type: Website
  url: https://powerline.ai/
- type: GettingStarted
  url: https://powerline.ai/inbox-preview/
- type: TermsOfService
  url: https://powerline.ai/terms
apis:
- name: Powerline MCP API
  description: Powerline provides AI-accessible email and DNS utilities via an MCP JSON‑RPC endpoint. Tools include domain
    health checks, DNS record validation, blacklist lookup, email header analysis, and spam‑word detection.
  humanURL: https://powerline.ai/
  baseURL: https://powerline.ai/mcp
  aid: powerline-ai:powerline-mcp-api
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Powerline only provides an MCP JSON‑RPC endpoint without an OpenAPI, AsyncAPI, GraphQL, gRPC, or WSDL contract.
  evidence:
  - url: https://powerline.ai/mcp
    status: 200
  checked: '2026-10-30'
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

powerline-ai API — frequently asked questions

Does powerline-ai have an API?

Yes. APIs.io lists 1 API from powerline-ai, including Powerline MCP API.

How do I authenticate with the powerline-ai API?

powerline-ai documents its authentication (0 schemes). The details are profiled on APIs.io as Powerline Ai Authentication.

Does powerline-ai have an MCP server?

Yes. APIs.io lists 1 MCP server for powerline-ai: Remote MCP server at powerline.ai.

Is the powerline-ai API ready for AI agents?

powerline-ai has a Kin Score of 15.5 out of 100 (emerging) and an Agent Readiness score of 12.1 (agent-aware), scored by API Evangelist on 2026-10-31.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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