Middle

Middle is an integration platform as a service (iPaaS) that helps businesses and their customers connect apps, enabling them to focus on product and service excellence rather than building integrations. The platform offers pre‑built integrations, agency, enterprise, and SaaS solutions, along with developer resources, pricing details, and support channels.

Middle is listed with 1 API on the APIs.io network. Tagged areas include Integration Platform, iPaaS, and Data Integration.

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

Middle’s developer surface includes changelog, authentication, getting-started guide, documentation, API reference, pricing, engineering blog, and 16 more developer resources.

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37.7/100 thin Agent 33/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

Integration Platform iPaaS Data Integration

Kin Score

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

Composite quality — 37.7/100 · thin

Contract Quality 5.6 / 21

Developer Ergonomics 9.7 / 17

Access Clarity 5.4 / 17

Operational Transparency 2.9 / 11

Contract Governance 3.4 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 33/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 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):

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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 26.3 — up to +18.4 composite points
Access Clarity scores 31.6 — up to +13.7 composite points
Operational Transparency scores 26.3 — up to +9.6 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/middle/apis.yml: open an issue on github.com/api-evangelist/middle 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.

Middle API

Middle API as documented publicly: 34 operations. Contract generated from the documentation by API Evangelist (2026-10-21); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Middle Plans Pricing

2 plans

PLANS

Semantic Vocabularies 1

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

Middle Context

6 classes · 10 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Middle API Rules

11 rules · 10 errors 1 info

SPECTRAL

JSON Schema 6

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

GetApiWorkflowInvokeOptionsListsResponse

7 properties

JSON SCHEMA

GetMiddleDocsGuidesAppReferenceClubreadyMdResponse

3 properties

JSON SCHEMA

GetMiddleDocsGuidesAppReferenceKlaviyoMdResponse

3 properties

JSON SCHEMA

GetMiddleDocsGuidesAppReferenceMdResponse

3 properties

JSON SCHEMA

PostApiWorkflowInvokePathtokenRunsRequest

1 properties

JSON SCHEMA

PostApiWorkflowInvokePathtokenRunsResponse

6 properties

JSON SCHEMA

Security Posture 2

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

Middle Authentication

3 schemes

SECURITY

Middle Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

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

WellKnown

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Access & Security 3

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

Pricing

Pricing

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: middle
name: Middle
image: https://cdn.prod.website-files.com/60cbf2e9c2e97574ee123d6e/61904cc194f49c7d0f78d651_Middle%20header.png
description: Middle is an integration platform as a service (iPaaS) that helps businesses and their customers connect apps,
  enabling them to focus on product and service excellence rather than building integrations. The platform offers pre‑built
  integrations, agency, enterprise, and SaaS solutions, along with developer resources, pricing details, and support channels.
url: https://raw.githubusercontent.com/api-evangelist/middle/refs/heads/main/apis.yml
x-type: company
x-source: harvest:g2-catalog
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-21 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-21'
modified: '2026-10-21'
tags:
- Integration Platform
- iPaaS
- Data Integration
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/middle-developers-security.txt
- type: Plans
  url: plans/middle-plans-pricing.yml
- type: Spectral
  url: rules/middle-rules.yml
- type: JSONLD
  url: json-ld/middle-context.jsonld
- type: Vocabulary
  url: vocabulary/middle-vocabulary.yml
- type: DataModel
  url: data-model/middle-data-model.yml
- type: ChangeLog
  url: changelog/middle-changelog.yml
- type: Authentication
  url: authentication/middle-authentication.yml
- type: Conformance
  url: conformance/middle-conformance.yml
- type: LLMsTxt
  url: llms/middle-llms.txt
- type: WellKnown
  url: well-known/middle-well-known.yml
- type: Hosts
  url: hosts/middle-hosts.yml
- type: Vendors
  url: vendors/middle-vendors.yml
- type: DeveloperPortal
  url: https://www.middle.app/developers
- type: ChangeLog
  url: https://docs.middle.app/middle-docs/release-notes/june-3-2026
- type: GettingStarted
  url: https://developers.hubspot.com/blog/arrows-enhances-customer-onboarding-with-hubspots-ui-extensions
- type: DomainSecurity
  url: security/middle-domain-security.yml
- type: Website
  url: https://middle.app/
- type: Documentation
  url: https://docs.middle.app/
- type: APIReference
  url: https://docs.middle.app/
- type: Pricing
  url: https://docs.middle.app/middle-docs/pricing
- type: Blog
  url: https://www.middle.app/blog
- type: Support
  url: https://41cefa.share-na2.hsforms.com/2gtvFGHa0RySQwJD5k843cg
apis:
- aid: middle:middle-api
  name: Middle API
  description: 'Middle API as documented publicly: 34 operations. Contract generated from the documentation by API Evangelist
    (2026-10-21); not the provider''s own document.'
  humanURL: https://docs.middle.app/middle-docs/product/real-time-workflow-api
  baseURL: https://test.middle.app
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/middle-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/middle-get-api-workflow-invoke-options-lists-response-schema.json
  - type: JSONSchema
    url: json-schema/middle-post-api-workflow-invoke-pathtoken-runs-response-schema.json
  - type: JSONSchema
    url: json-schema/middle-get-middle-docs-guides-app-reference-klaviyo-md-response-schema.json
  - type: JSONSchema
    url: json-schema/middle-get-middle-docs-guides-app-reference-md-response-schema.json
  - type: JSONSchema
    url: json-schema/middle-get-middle-docs-guides-app-reference-clubready-md-response-schema.json
  - type: JSONSchema
    url: json-schema/middle-post-api-workflow-invoke-pathtoken-runs-request-schema.json
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  method: derived
  generated: '2026-10-21'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes developer documentation but serves no machine-readable contract from it
  evidence:
  - url: https://middle.app/
    status: 200
x-enrichment:
  date: '2026-10-21'
  status: enriched
  artifacts_added: 29
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Middle API — frequently asked questions

Does Middle have an API?

Yes. APIs.io lists 1 API from Middle, including Middle API.

Is there an OpenAPI specification for the Middle API?

Yes. APIs.io indexes 1 OpenAPI specification for Middle, each linked for download from this page.

How do I authenticate with the Middle API?

Middle documents its authentication (3 schemes). The details are profiled on APIs.io as Middle Authentication.

How much does the Middle API cost?

APIs.io lists 2 pricing plans for Middle, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Middle API ready for AI agents?

Middle has a Kin Score of 37.7 out of 100 (thin) and an Agent Readiness score of 33.3 (agent-ready), scored by API Evangelist on 2026-10-31.

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get_provider_artifactsEvery artifact this provider publishes, grouped by type.
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.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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find_cohortsEvery scored population of providers in the catalog.

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