Cosuno

Cosuno is an AI‑based tendering platform for the construction industry in Germany, Austria and Switzerland. It connects clients and subcontractors, offering over 4,000 private/commercial tenders per month from 600+ clients, helping contractors win jobs with AI‑assisted bid creation and delivering average cost savings of 5‑7%.

Cosuno publishes 17 API contracts indexed on the APIs.io network, including Awarded Bids API, Bid Package Custom Fields API, Bid Packages API, and 14 more. Tagged areas include Construction, Marketplace, Artificial Intelligence, Tendering, and Germany.

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

Cosuno’s developer surface includes documentation, authentication, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

34.9/100 thin ▬ flat Agent 32/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 4 Agent Skills

Construction Marketplace Artificial IntelligenceTenderingGermany

Kin Score

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

Composite quality — 34.9/100 · thin

Contract Quality 12.5 / 19

Developer Ergonomics 2.8 / 15

Access Clarity 0.8 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.8 / 9

Discoverability 5.6 / 8

Regulatory Posture 2.6 / 15

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 0 / 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
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
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

7 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 5.3 — up to +18.9 composite points
Developer Ergonomics scores 18.5 — up to +16.3 composite points
Operational Transparency scores 10.5 — up to +11.6 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/cosuno/apis.yml: open an issue on github.com/api-evangelist/cosuno 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 17

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

Cosuno Awarded Bids API

The Awarded Bids API from Cosuno — 1 operation(s) for awarded bids.

Cosuno Bid Package Custom Fields API

The Bid Package Custom Fields API from Cosuno — 2 operation(s) for bid package custom fields.

Cosuno Bid Packages API

The Bid Packages API from Cosuno — 14 operation(s) for bid packages.

Cosuno Bid Requests API

The Bid Requests API from Cosuno — 10 operation(s) for bid requests.

Cosuno Bids API

The Bids API from Cosuno — 9 operation(s) for bids.

Cosuno Company API

The Company API from Cosuno — 7 operation(s) for company.

Cosuno Current User API

The Current User API from Cosuno — 1 operation(s) for current user.

Cosuno Offices API

The Offices API from Cosuno — 2 operation(s) for offices.

Cosuno Project Costs API

The Project Costs API from Cosuno — 2 operation(s) for project costs.

Cosuno Project Custom Fields API

The Project Custom Fields API from Cosuno — 2 operation(s) for project custom fields.

Cosuno Projects API

The Projects API from Cosuno — 13 operation(s) for projects.

Cosuno Subcontractor Custom Fields API

The Subcontractor Custom Fields API from Cosuno — 2 operation(s) for subcontractor custom fields.

Cosuno Subcontractor Reviews API

The Subcontractor Reviews API from Cosuno — 2 operation(s) for subcontractor reviews.

Cosuno Subcontractors API

The Subcontractors API from Cosuno — 4 operation(s) for subcontractors.

Cosuno Users API

The Users API from Cosuno — 3 operation(s) for users.

Cosuno Webhooks API

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

Cosuno Work Categories API

The Work Categories API from Cosuno — 1 operation(s) for work categories.

Scroll for all 17

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

cosuno-create-project-with-files

AGENT SKILL

cosuno-manage-awarded-bids-webhooks

AGENT SKILL

cosuno-manage-bid-request-files

AGENT SKILL

cosuno-upload-and-download-shared-file

AGENT SKILL

Semantic Vocabularies 1

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

Cosuno Context

120 classes · 205 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Cosuno API Rules

16 rules · 15 errors 1 info

SPECTRAL

JSON Schema 6

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

BidPackageResponse

23 properties

JSON SCHEMA

CreateSubcontractorInput

25 properties

JSON SCHEMA

ProjectResponse

22 properties

JSON SCHEMA

SubcontractorResponse

29 properties

JSON SCHEMA

UpdateSubcontractorInput

25 properties

JSON SCHEMA

UpsertSubcontractorInput

27 properties

JSON SCHEMA

Security Posture 2

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

Cosuno Authentication

http · 1 scheme

SECURITY

Cosuno Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Cosuno Agentic Access

107 operations · 60 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 3

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 2

Properties that don't map to a standard resource type

Vendors

Vendors

Hosts

Hosts

Source (apis.yml)

aid: cosuno
name: Cosuno
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://www.cosuno.com/assets/brand-logo-C5d0Dbh5.svg
description: Cosuno is an AI‑based tendering platform for the construction industry in Germany, Austria and Switzerland. It
  connects clients and subcontractors, offering over 4,000 private/commercial tenders per month from 600+ clients, helping
  contractors win jobs with AI‑assisted bid creation and delivering average cost savings of 5‑7%.
url: https://raw.githubusercontent.com/api-evangelist/cosuno/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-11 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-11'
modified: '2026-10-11'
tags:
- Construction
- Marketplace
- Artificial Intelligence
- Tendering
- Germany
tags_raw:
- Construction
- Marketplace
- AI
- Tendering
- Germany
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Vendors
  url: vendors/cosuno-vendors.yml
- type: AgenticAccess
  url: agentic-access/cosuno-agentic-access.yml
- type: Spectral
  url: rules/cosuno-rules.yml
- type: JSONLD
  url: json-ld/cosuno-context.jsonld
- type: Vocabulary
  url: vocabulary/cosuno-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/cosuno-data-model.yml
- type: ErrorCatalog
  url: errors/cosuno-problem-types.yml
- type: Conformance
  url: conformance/cosuno-conformance.yml
- type: LLMsTxt
  url: llms/cosuno-llms.txt
- type: SecurityTxt
  url: well-known/cosuno-help-security.txt
- type: WellKnown
  url: well-known/cosuno-well-known.yml
- type: Hosts
  url: hosts/cosuno-hosts.yml
- type: TermsOfService
  url: https://www.cosuno.com/web/en/legal-notice
- type: Newsroom
  url: https://www.cosuno.com/web/en/press
- type: Documentation
  url: https://help.cosuno.com/
- type: Authentication
  url: authentication/cosuno-authentication.yml
- type: DomainSecurity
  url: security/cosuno-domain-security.yml
- type: Website
  url: https://www.cosuno.com/en
apis:
- aid: cosuno:cosuno-awarded-bids-api
  name: Cosuno Awarded Bids API
  description: The Awarded Bids API from Cosuno — 1 operation(s) for awarded bids.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Awarded Bids
  properties:
  - type: OpenAPI
    url: openapi/cosuno-awarded-bids-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-bid-package-custom-fields-api
  name: Cosuno Bid Package Custom Fields API
  description: The Bid Package Custom Fields API from Cosuno — 2 operation(s) for bid package custom fields.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Bid Package Custom Fields
  properties:
  - type: OpenAPI
    url: openapi/cosuno-bid-package-custom-fields-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-bid-packages-api
  name: Cosuno Bid Packages API
  description: The Bid Packages API from Cosuno — 14 operation(s) for bid packages.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Bid Packages
  properties:
  - type: OpenAPI
    url: openapi/cosuno-bid-packages-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-bid-requests-api
  name: Cosuno Bid Requests API
  description: The Bid Requests API from Cosuno — 10 operation(s) for bid requests.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Bid Requests
  properties:
  - type: OpenAPI
    url: openapi/cosuno-bid-requests-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-bids-api
  name: Cosuno Bids API
  description: The Bids API from Cosuno — 9 operation(s) for bids.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Bids
  properties:
  - type: OpenAPI
    url: openapi/cosuno-bids-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-company-api
  name: Cosuno Company API
  description: The Company API from Cosuno — 7 operation(s) for company.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Company
  properties:
  - type: OpenAPI
    url: openapi/cosuno-company-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-current-user-api
  name: Cosuno Current User API
  description: The Current User API from Cosuno — 1 operation(s) for current user.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Current User
  properties:
  - type: OpenAPI
    url: openapi/cosuno-current-user-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-offices-api
  name: Cosuno Offices API
  description: The Offices API from Cosuno — 2 operation(s) for offices.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Offices
  properties:
  - type: OpenAPI
    url: openapi/cosuno-offices-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-project-costs-api
  name: Cosuno Project Costs API
  description: The Project Costs API from Cosuno — 2 operation(s) for project costs.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Project Costs
  properties:
  - type: OpenAPI
    url: openapi/cosuno-project-costs-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-project-custom-fields-api
  name: Cosuno Project Custom Fields API
  description: The Project Custom Fields API from Cosuno — 2 operation(s) for project custom fields.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Project Custom Fields
  properties:
  - type: OpenAPI
    url: openapi/cosuno-project-custom-fields-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-projects-api
  name: Cosuno Projects API
  description: The Projects API from Cosuno — 13 operation(s) for projects.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/cosuno-projects-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-subcontractor-custom-fields-api
  name: Cosuno Subcontractor Custom Fields API
  description: The Subcontractor Custom Fields API from Cosuno — 2 operation(s) for subcontractor custom fields.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Subcontractor Custom Fields
  properties:
  - type: OpenAPI
    url: openapi/cosuno-subcontractor-custom-fields-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-subcontractor-reviews-api
  name: Cosuno Subcontractor Reviews API
  description: The Subcontractor Reviews API from Cosuno — 2 operation(s) for subcontractor reviews.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Subcontractor Reviews
  properties:
  - type: OpenAPI
    url: openapi/cosuno-subcontractor-reviews-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-subcontractors-api
  name: Cosuno Subcontractors API
  description: The Subcontractors API from Cosuno — 4 operation(s) for subcontractors.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Subcontractors
  properties:
  - type: OpenAPI
    url: openapi/cosuno-subcontractors-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-users-api
  name: Cosuno Users API
  description: The Users API from Cosuno — 3 operation(s) for users.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/cosuno-users-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-webhooks-api
  name: Cosuno Webhooks API
  description: The Webhooks API from Cosuno — 2 operation(s) for webhooks.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/cosuno-webhooks-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
- aid: cosuno:cosuno-work-categories-api
  name: Cosuno Work Categories API
  description: The Work Categories API from Cosuno — 1 operation(s) for work categories.
  humanURL: https://api.cosuno.com/v1
  baseURL: https://api.cosuno.com/v1
  tags:
  - Work Categories
  properties:
  - type: OpenAPI
    url: openapi/cosuno-work-categories-api-openapi.yml
  - type: JSONSchema
    url: json-schema/cosuno-update-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-subcontractor-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-upsert-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-create-subcontractor-input-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-bid-package-response-schema.json
  - type: JSONSchema
    url: json-schema/cosuno-project-response-schema.json
x-enrichment:
  date: '2026-10-11'
  status: enriched
  artifacts_added: 22
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Cosuno API — frequently asked questions

Does Cosuno have an API?

Yes. APIs.io lists 17 APIs from Cosuno, including Cosuno Awarded Bids API, Cosuno Bid Package Custom Fields API and Cosuno Bid Packages API, and 14 more.

Is there an OpenAPI specification for the Cosuno API?

Yes. APIs.io indexes 17 OpenAPI specifications for Cosuno, each linked for download from this page.

How do I authenticate with the Cosuno API?

Cosuno uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Cosuno Authentication.

Is the Cosuno API ready for AI agents?

Cosuno has a Kin Score of 34.9 out of 100 (thin) and an Agent Readiness score of 31.8 (agent-ready), scored by API Evangelist on 2026-11-06.

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get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
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