Fulfil

Fulfil is a cloud ERP and operations platform for e-commerce, DTC, and wholesale merchants - unifying order management, inventory, warehouse operations (WMS), manufacturing and production (MRP), purchasing, and accounting in one system, purpose-built for Shopify Plus and high-volume DTC brands. The Fulfil REST API (v2) exposes every ERP model through a single uniform model interface at https://{merchant_id}.fulfil.io/api/v2, advertising 6,000+ endpoints with full create/read/update/delete access, action calls, reports, and wizards across all models. Authentication is via OAuth 2.0 for public apps or personal access tokens (X-API-KEY / HTTP Basic) for private integrations, and outbound webhooks (with a Google Pub/Sub option) deliver real-time ERP events such as order and shipment changes.

Fulfil publishes 10 API contracts indexed on the APIs.io network, including Authentication API, Customers API, Inventory & Stock API, and 7 more. Tagged areas include ERP, E-Commerce, Order Management, Inventory, and Warehouse Management.

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

Fulfil’s developer surface includes authentication, documentation, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.2/100 thin ▬ flat Agent 24/100 agent aware Front door AI 6/6 dominant Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract

ERP E-Commerce Order Management Inventory Warehouse Management Manufacturing

What this lets a business do 5

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

Procurement Management

BC-500

Purchases

GET /model/purchase.purchase POST /model/purchase.purchase

Inventory Management

BC-530

Inventory & Stock

GET /model/stock.move GET /model/stock.location

Customer Relationship Management

BC-420

Customers

GET /model/party.party POST /model/party.party

Information & Data Management

BC-610

Products & Variants

GET /model/product.template GET /model/product.product

Supply Chain Management

BC-520

Shipments

GET /model/stock.shipment.out GET /model/stock.shipment.in

Kin Score

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

Composite quality — 33.2/100 · thin

Contract Quality 9.0 / 19

Developer Ergonomics 3.9 / 15

Access Clarity 2.4 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 4.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · 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 6 / 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
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

8 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 15.8 — up to +16.8 composite points
Developer Ergonomics scores 26.2 — up to +14.8 composite points
Contract Quality scores 47.8 — up to +13.1 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/fulfil-io/apis.yml: open an issue on github.com/api-evangelist/fulfil-io 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
Commerce Platform Ecosystems (Shopify, WooCommerce, Stripe Apps)	builds-on	45.4	-	2
Agent Skills (SKILL.md packages)	builds-on	45.4	-	2
Stripe App Marketplace and Partner Ecosystem (builders on Stripe)	builds-on	45.4	-	2
Amazon Seller Ecosystem (Selling Partner Appstore, Amazon Ads partners)	builds-on	45.4	-	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 10

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

Fulfil Authentication API

Verify API credentials.

Fulfil Customers API

Customers, suppliers, and contacts via the party.party model.

Fulfil Inventory & Stock API

Inventory via stock.move and stock.location models.

Fulfil Manufacturing API

Production orders via the production model.

Fulfil Model Interface API

The generic model interface applicable to any Fulfil model.

Fulfil Products & Variants API

Catalog via product.template and product.product models.

Fulfil Purchases API

Purchase orders via the purchase.purchase model.

Fulfil Sales Orders API

Sales orders via the sale.sale model.

Fulfil Shipments API

Fulfillment via stock.shipment.out and stock.shipment.in models.

Fulfil Webhooks API

Webhook subscriptions for real-time ERP events.

Scroll for all 10

Open Collections 11

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

Fulfil REST API (v2) Authentication API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Customers API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Inventory & Stock API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Manufacturing API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Model Interface API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Products & Variants API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Purchases API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Sales Orders API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Shipments API

OPEN COLLECTION

Fulfil REST API (v2) Authentication Webhooks API

OPEN COLLECTION

Fulfil REST API (v2)

OPEN COLLECTION

Scroll for all 11

Fulfil API pricing

Not yet checked against Fulfil's own pricing page. Compiled by API Evangelist on 2026-07-04 from www.fulfil.io/; confirm before you rely on a figure.

Plan	Price
Fulfil ERP Subscription (Quote-Based) subscription	—
Warehouse Management (WMS) Add-On subscription	—
Manufacturing (MRP) Add-On subscription	—
Enterprise / High Volume enterprise	—

Plan details, limits and sources →

Rate limits

Standard API Requests: 1000+ per minute (advertised) requests
High-Volume / Enterprise: negotiated (contact sales) requests
Pagination: per_page (default ~100) records

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

Pricing Plans 1

Published pricing tiers and plan structures.

Fulfil Io Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Fulfil Io 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.

Fulfil

SLA

FinOps 1

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

Fulfil Io Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Fulfil API Rules

63 rules · 61 errors 1 warnings 1 info

SPECTRAL

Security Posture 4

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

Fulfil Io Authentication

apiKey/oauth2 · 2 schemes

SECURITY

Fulfil Io Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Fulfil Io Vulnerability Disclosure

security.txt · contact published

SECURITY

Fulfil Io Trust Center

SOC 2, GDPR

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Fulfil Io Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

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

Fulfil Io Agentic Access

31 operations · 17 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

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

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 3

The organization behind the API

BlogRSS

BlogRSS

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: fulfil-io
url: https://raw.githubusercontent.com/api-evangelist/fulfil-io/refs/heads/main/apis.yml
name: Fulfil
kind: company
description: Fulfil is a cloud ERP and operations platform for e-commerce, DTC, and wholesale merchants - unifying order management,
  inventory, warehouse operations (WMS), manufacturing and production (MRP), purchasing, and accounting in one system, purpose-built
  for Shopify Plus and high-volume DTC brands. The Fulfil REST API (v2) exposes every ERP model through a single uniform model
  interface at https://{merchant_id}.fulfil.io/api/v2, advertising 6,000+ endpoints with full create/read/update/delete access,
  action calls, reports, and wizards across all models. Authentication is via OAuth 2.0 for public apps or personal access
  tokens (X-API-KEY / HTTP Basic) for private integrations, and outbound webhooks (with a Google Pub/Sub option) deliver real-time
  ERP events such as order and shipment changes.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - scopes
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/fulfil-io.png
tags:
- ERP
- E-Commerce
- Order Management
- Inventory
- Warehouse Management
- Manufacturing
tags_raw:
- ERP
- E-commerce
- Order Management
- Inventory
- Warehouse Management
- Manufacturing
- Operations
created: '2026-07-04'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: fulfil-io:fulfil-io-authentication-api
  name: Fulfil Authentication API
  description: Verify API credentials.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-authentication-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-customers-api
  name: Fulfil Customers API
  description: Customers, suppliers, and contacts via the party.party model.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Customers
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-customers-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-inventory-stock-api
  name: Fulfil Inventory & Stock API
  description: Inventory via stock.move and stock.location models.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Inventory & Stock
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-inventory-stock-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-manufacturing-api
  name: Fulfil Manufacturing API
  description: Production orders via the production model.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Manufacturing
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-manufacturing-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-model-interface-api
  name: Fulfil Model Interface API
  description: The generic model interface applicable to any Fulfil model.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Model Interface
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-model-interface-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-products-variants-api
  name: Fulfil Products & Variants API
  description: Catalog via product.template and product.product models.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Products & Variants
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-products-variants-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-purchases-api
  name: Fulfil Purchases API
  description: Purchase orders via the purchase.purchase model.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Purchases
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-purchases-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-sales-orders-api
  name: Fulfil Sales Orders API
  description: Sales orders via the sale.sale model.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Sales Orders
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-sales-orders-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-shipments-api
  name: Fulfil Shipments API
  description: Fulfillment via stock.shipment.out and stock.shipment.in models.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Shipments
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-shipments-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
- aid: fulfil-io:fulfil-io-webhooks-api
  name: Fulfil Webhooks API
  description: Webhook subscriptions for real-time ERP events.
  humanURL: https://developers.fulfil.io/
  baseURL: https://{merchant_id}.fulfil.io/api/v2
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/fulfil-io-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developers.fulfil.io/
  - type: APIReference
    url: https://fulfiliorestapi.docs.apiary.io/
  - type: PostmanCollection
    url: collections/fulfil-io.postman_collection.json
  - type: OpenCollection
    url: collections/fulfil-io.opencollection.json
  - type: Documentation
    url: https://docs.fulfil.io/production/
  - type: Documentation
    url: https://www.fulfil.io/platform/api/
common:
- url: https://blog.fulfil.io/rss/
  type: BlogRSS
- type: CapabilityMap
  url: capabilities/fulfil-io-capability-edges.yml
  name: Fulfil Business Capability Map
- type: AgenticAccess
  url: agentic-access/fulfil-io-agentic-access.yml
- type: TrustCenter
  url: security/fulfil-io-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/fulfil-io-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/fulfil-io-domain-security.yml
- type: Authentication
  url: authentication/fulfil-io-authentication.yml
- type: OAuthScopes
  url: scopes/fulfil-io-scopes.yml
- type: GitHubOrganization
  url: https://github.com/fulfilio
- type: LinkedIn
  url: https://www.linkedin.com/company/fulfil-io
- type: Website
  url: https://www.fulfil.io
- type: Documentation
  url: https://developers.fulfil.io/
- type: Plans
  url: plans/fulfil-io-plans-pricing.yml
- type: RateLimits
  url: rate-limits/fulfil-io-rate-limits.yml
- type: FinOps
  url: finops/fulfil-io-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Fulfil API — frequently asked questions

Does Fulfil have an API?

Yes. APIs.io lists 10 APIs from Fulfil, including Fulfil Authentication API, Fulfil Customers API and Fulfil Inventory & Stock API, and 7 more.

Is there an OpenAPI specification for the Fulfil API?

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

How do I authenticate with the Fulfil API?

Fulfil uses bearer-token authentication (apiKey/oauth2 · 2 schemes). The details are profiled on APIs.io as Fulfil Io Authentication.

How much does the Fulfil API cost?

APIs.io lists 4 pricing plans for Fulfil, with each plan's price, limits and inclusions under Pricing on this page.

Is the Fulfil API ready for AI agents?

Fulfil has a Kin Score of 33.2 out of 100 (thin) and an Agent Readiness score of 24.4 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

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A second provider on the same verified email joins the account you already have.