Sirion

Sirion (SirionLabs) is an AI-native enterprise Contract Lifecycle Management (CLM) platform. SirionOne manages the full agreement lifecycle - authoring, negotiation, e-signature, a searchable contract repository, metadata and clause extraction, obligation and performance management, and supplier / counterparty governance. The platform exposes REST "Business API & Integrations" capabilities plus pre-built connectors (Salesforce, SAP Ariba, SAP S/4HANA, DocuSign, iPaaS) and configurable webhooks, secured with OAuth 2.0 client credentials. API access is enterprise / contract-gated - credentials are provisioned per tenant and the API reference is available to authenticated Sirion users. Endpoint paths and schemas in this entry are MODELED from public product references, not copied from a public reference document.

Sirion publishes 6 API contracts indexed on the APIs.io network, including Contract Requests API, Contracts API, Metadata & Clauses API, and 3 more. Tagged areas include Contract Management, Contract Lifecycle Management, Contracts, Artificial Intelligence, and Enterprise.

The Sirion catalog on APIs.io includes 1 Spectral governance ruleset.

Sirion’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.8/100 thin ▬ flat Agent 22/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessEnterpriseSelf serve

1 published contract

Contract Management Contract Lifecycle Management Contracts Artificial Intelligence Enterprise Legal Agreements Supplier Management Obligations

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Legal Management

BC-150

Contract RequestsContractsMetadata & ClausesObligations

GET /contracts POST /contracts PATCH /contracts/{contractId} POST /contract-requests

Kin Score

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

Composite quality — 26.8/100 · thin

Contract Quality 7.9 / 19

Developer Ergonomics 3.4 / 15

Access Clarity 0.8 / 15

Operational Transparency 0.8 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 1.6 / 15

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 22/100 · agent aware

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 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 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 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)
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

10 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 22.6 — up to +15.5 composite points
Contract Quality scores 42.2 — up to +14.5 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/sirion/apis.yml: open an issue on github.com/api-evangelist/sirion 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Procurement and B2B Buying (source-to-pay suites, spend management)	mixed	46.2	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 6

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

Sirion Contract Requests API

Contract Requests (CDRs) that drive intake and authoring (MODELED).

Sirion Contracts API

Executed contracts / agreements in the SirionOne repository (MODELED).

Sirion Metadata & Clauses API

Contract metadata fields and AI-extracted clauses (MODELED).

Sirion Obligations API

Contractual obligations and performance tracking (MODELED).

Sirion Suppliers API

Suppliers and counterparties linked to contracts (MODELED).

Sirion Webhooks API

Outbound webhook subscriptions for event notifications (MODELED).

Open Collections 7

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Sirion CLM API (Modeled) Contract Requests API

OPEN COLLECTION

Sirion CLM API (Modeled) Contract Requests Contracts API

OPEN COLLECTION

Sirion CLM API (Modeled) Contract Requests Metadata & Clauses API

OPEN COLLECTION

Sirion CLM API (Modeled) Contract Requests Obligations API

OPEN COLLECTION

Sirion CLM API (Modeled) Contract Requests Suppliers API

OPEN COLLECTION

Sirion CLM API (Modeled) Contract Requests Webhooks API

OPEN COLLECTION

Sirion CLM API (Modeled)

OPEN COLLECTION

Scroll for all 7

Sirion API pricing

Not yet checked against Sirion's own pricing page. Compiled by API Evangelist on 2026-07-12 from www.sirion.ai; confirm before you rely on a figure.

Plan	Price
Enterprise (Contact Sales) enterprise	—

Plan details, limits and sources →

Rate limits

Business API Requests: not published requests
Webhook Delivery: not published events
Async Replication Throughput: not published records

Compiled by API Evangelist, not yet checked against Sirion's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Sirion Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sirion Rate Limits

3 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Sirion

SLA

FinOps 1

Cost, billing, and metering signals for API financial operations.

Sirion Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Sirion API Rules

66 rules · 64 errors 1 warnings 1 info

SPECTRAL

Security Posture 2

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

Sirion Authentication

oauth2 · 1 scheme

SECURITY

Sirion Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Sirion Agentic Access

15 operations · 7 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

LinkedIn

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: sirion
url: https://raw.githubusercontent.com/api-evangelist/sirion/refs/heads/main/apis.yml
name: Sirion
kind: company
description: Sirion (SirionLabs) is an AI-native enterprise Contract Lifecycle Management (CLM) platform. SirionOne manages
  the full agreement lifecycle - authoring, negotiation, e-signature, a searchable contract repository, metadata and clause
  extraction, obligation and performance management, and supplier / counterparty governance. The platform exposes REST "Business
  API & Integrations" capabilities plus pre-built connectors (Salesforce, SAP Ariba, SAP S/4HANA, DocuSign, iPaaS) and configurable
  webhooks, secured with OAuth 2.0 client credentials. API access is enterprise / contract-gated - credentials are provisioned
  per tenant and the API reference is available to authenticated Sirion users. Endpoint paths and schemas in this entry are
  MODELED from public product references, not copied from a public reference document.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Enterprise · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sirion.png
tags:
- Contract Management
- Contract Lifecycle Management
- Contracts
- Artificial Intelligence
- Enterprise
- Legal
- Agreements
- Supplier Management
- Obligations
tags_raw:
- Contract Management
- Contract Lifecycle Management
- CLM
- Contracts
- AI
- Enterprise
- Legal
- Agreements
- Supplier Management
- Obligations
created: '2026-07-12'
modified: '2026-07-12'
specificationVersion: '0.23'
apis:
- aid: sirion:sirion-contract-requests-api
  name: Sirion Contract Requests API
  description: Contract Requests (CDRs) that drive intake and authoring (MODELED).
  humanURL: https://www.sirion.ai/integrations/
  baseURL: https://{tenant}.sirioncloud.com
  tags:
  - Contract Requests
  properties:
  - type: OpenAPI
    url: openapi/sirion-contract-requests-api-openapi.yml
  - type: Documentation
    url: https://www.sirion.ai/integrations/
  - type: APIReference
    url: https://docs.sirion.ai
  - type: PostmanCollection
    url: collections/sirion.postman_collection.json
  - type: OpenCollection
    url: collections/sirion.opencollection.json
- aid: sirion:sirion-contracts-api
  name: Sirion Contracts API
  description: Executed contracts / agreements in the SirionOne repository (MODELED).
  humanURL: https://www.sirion.ai/integrations/
  baseURL: https://{tenant}.sirioncloud.com
  tags:
  - Contracts
  properties:
  - type: OpenAPI
    url: openapi/sirion-contracts-api-openapi.yml
  - type: Documentation
    url: https://www.sirion.ai/integrations/
  - type: APIReference
    url: https://docs.sirion.ai
  - type: PostmanCollection
    url: collections/sirion.postman_collection.json
  - type: OpenCollection
    url: collections/sirion.opencollection.json
- aid: sirion:sirion-metadata-clauses-api
  name: Sirion Metadata & Clauses API
  description: Contract metadata fields and AI-extracted clauses (MODELED).
  humanURL: https://www.sirion.ai/integrations/
  baseURL: https://{tenant}.sirioncloud.com
  tags:
  - Metadata & Clauses
  properties:
  - type: OpenAPI
    url: openapi/sirion-metadata-clauses-api-openapi.yml
  - type: Documentation
    url: https://www.sirion.ai/integrations/
  - type: APIReference
    url: https://docs.sirion.ai
  - type: PostmanCollection
    url: collections/sirion.postman_collection.json
  - type: OpenCollection
    url: collections/sirion.opencollection.json
- aid: sirion:sirion-obligations-api
  name: Sirion Obligations API
  description: Contractual obligations and performance tracking (MODELED).
  humanURL: https://www.sirion.ai/integrations/
  baseURL: https://{tenant}.sirioncloud.com
  tags:
  - Obligations
  properties:
  - type: OpenAPI
    url: openapi/sirion-obligations-api-openapi.yml
  - type: Documentation
    url: https://www.sirion.ai/integrations/
  - type: APIReference
    url: https://docs.sirion.ai
  - type: PostmanCollection
    url: collections/sirion.postman_collection.json
  - type: OpenCollection
    url: collections/sirion.opencollection.json
- aid: sirion:sirion-suppliers-api
  name: Sirion Suppliers API
  description: Suppliers and counterparties linked to contracts (MODELED).
  humanURL: https://www.sirion.ai/integrations/
  baseURL: https://{tenant}.sirioncloud.com
  tags:
  - Suppliers
  properties:
  - type: OpenAPI
    url: openapi/sirion-suppliers-api-openapi.yml
  - type: Documentation
    url: https://www.sirion.ai/integrations/
  - type: APIReference
    url: https://docs.sirion.ai
  - type: PostmanCollection
    url: collections/sirion.postman_collection.json
  - type: OpenCollection
    url: collections/sirion.opencollection.json
- aid: sirion:sirion-webhooks-api
  name: Sirion Webhooks API
  description: Outbound webhook subscriptions for event notifications (MODELED).
  humanURL: https://www.sirion.ai/integrations/
  baseURL: https://{tenant}.sirioncloud.com
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/sirion-webhooks-api-openapi.yml
  - type: Documentation
    url: https://www.sirion.ai/integrations/
  - type: APIReference
    url: https://docs.sirion.ai
  - type: PostmanCollection
    url: collections/sirion.postman_collection.json
  - type: OpenCollection
    url: collections/sirion.opencollection.json
common:
- type: CapabilityMap
  url: capabilities/sirion-capability-edges.yml
  name: Sirion Business Capability Map
- type: AgenticAccess
  url: agentic-access/sirion-agentic-access.yml
- type: Authentication
  url: authentication/sirion-authentication.yml
- type: Website
  url: https://www.sirion.ai
- type: Documentation
  url: https://docs.sirion.ai
- type: Plans
  url: plans/sirion-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sirion-rate-limits.yml
- type: FinOps
  url: finops/sirion-finops.yml
- type: DomainSecurity
  url: security/sirion-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/sirionlabs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Sirion API — frequently asked questions

Does Sirion have an API?

Yes. APIs.io lists 6 APIs from Sirion, including Sirion Contract Requests API, Sirion Contracts API and Sirion Metadata & Clauses API, and 3 more.

Is there an OpenAPI specification for the Sirion API?

Yes. APIs.io indexes 6 OpenAPI specifications for Sirion, each linked for download from this page.

How do I authenticate with the Sirion API?

Sirion documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Sirion Authentication.

How much does the Sirion API cost?

APIs.io lists 1 pricing plan for Sirion, with each plan's price, limits and inclusions under Pricing on this page.

Is the Sirion API ready for AI agents?

Sirion has a Kin Score of 26.8 out of 100 (thin) and an Agent Readiness score of 21.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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