Blng

BLNG is an AI-driven creative suite for the jewelry industry, giving jewelers, designers, brands, and retailers tools to explore, refine, and present designs fast and without compromise. Its Design product turns sketches, doodles, photos, illustrations, or text prompts into photorealistic renderings on web and iOS; Studio transforms CAD models into market-ready marketing photos and videos at scale; and Retail enables live, made-to-order design in-store. BLNG is a Speedinvest portfolio company. BLNG publishes no developer program, but the web application is backed by three first-party REST APIs whose OpenAPI definitions are served publicly and unauthenticated behind Swagger UI on its own hosts — a Journey API for design journeys, prompts, image assets and 3D model generation, a User API for users, workspaces, invitations, organizations and subscriptions, and a Billing API for Stripe-backed products, checkout and subscription webhooks. All three authenticate with AWS Cognito bearer tokens issued at auth.app.blng.ai.

Blng publishes 14 APIs on the APIs.io network, including User API, Billing API, Chat Prompts API, and 11 more. Tagged areas include Company, Jewelry, Generative AI, Design, and Creative Tools.

The Blng catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Blng’s developer surface includes documentation, getting-started guide, pricing, engineering blog, support, signup flow, authentication, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

49.1/100 developing ▬ flat Agent 34/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve

4 APIs

Company Jewelry Generative AI Design Creative Tools Rendering Marketing Retail 3D Models Image-Generation Workspaces Billing OpenAPIAWS Cognito

What this lets a business do 2

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

Subscription Lifecycle Management

BC-4240

SubscriptionUser Subscription

Subscription Billing & Revenue Management

BC-4250

Billing

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 49.1/100 · developing

Contract Quality 12.2 / 23

Developer Ergonomics 8.9 / 18

Access Clarity 12.8 / 18

Operational Transparency 2.8 / 12

Contract Governance 0.5 / 11

Discoverability 6.7 / 9

Create-or-Update Ergonomics 1.1 / 10

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 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 6 / 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

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.

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 github.com/api-evangelist/blng: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 14

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

BLNG User API

REST API that manages BLNG users, roles and permissions, workspaces and workspace members, workspace and subscription invitations, organizations, SSO configuration, marketing co...

BLNG Billing API

REST API that manages BLNG payment and billing — listing Stripe products and prices, creating Stripe checkout sessions and customer-portal sessions, confirming checkout, and sub...

Blng Chat Prompts API

The Chat Prompts API from Blng — 2 operation(s) for chat prompts.

Blng Composite API

The Composite API from Blng — 2 operation(s) for composite.

Blng Design Journey API

The Design Journey API from Blng — 16 operation(s) for design journey.

Blng Invitation API

The Invitation API from Blng — 5 operation(s) for invitation.

Blng Journeys API

The Journeys API from Blng — 6 operation(s) for journeys.

Blng Organization API

The Organization API from Blng — 3 operation(s) for organization.

Blng Prompts API

The Prompts API from Blng — 4 operation(s) for prompts.

Blng Subscription API

The Subscription API from Blng — 4 operation(s) for subscription.

Blng User Subscription API

The User Subscription API from Blng — 3 operation(s) for user subscription.

Blng User Tooltip API

The User Tooltip API from Blng — 2 operation(s) for user tooltip.

Blng Webhook API

The Webhook API from Blng — 3 operation(s) for webhook.

Blng Workspace API

The Workspace API from Blng — 15 operation(s) for workspace.

Scroll for all 14

Pricing Plans 1

Published pricing tiers and plan structures.

Blng Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Blng Rate Limits

2 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Blng Webhooks

ASYNCAPI

Security Posture 3

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

Blng Authentication

http/oauth2 · 2 schemes

SECURITY

Blng Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Blng Trust Center

trust center published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Blng Scopes

4 scopes · implicit

4 scopes

SCOPES

Agentic Access 1

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

Blng Agentic Access

88 operations · 49 acting · 3 human-in-the-loop

88 operations · 49 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Lifecycle

Conventions

ErrorCatalog

DataModel

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

DomainSecurity

TrustCenter

TrustCenter

Authentication

OAuthScopes

Operate 4

Status, limits, changes, and where to get help

HelpCenter

Support

StatusPage

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

Plans

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Instagram

Instagram

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: blng
name: Blng
description: BLNG is an AI-driven creative suite for the jewelry industry, giving jewelers, designers, brands, and retailers
  tools to explore, refine, and present designs fast and without compromise. Its Design product turns sketches, doodles, photos,
  illustrations, or text prompts into photorealistic renderings on web and iOS; Studio transforms CAD models into market-ready
  marketing photos and videos at scale; and Retail enables live, made-to-order design in-store. BLNG is a Speedinvest portfolio
  company. BLNG publishes no developer program, but the web application is backed by three first-party REST APIs whose OpenAPI
  definitions are served publicly and unauthenticated behind Swagger UI on its own hosts — a Journey API for design journeys,
  prompts, image assets and 3D model generation, a User API for users, workspaces, invitations, organizations and subscriptions,
  and a Billing API for Stripe-backed products, checkout and subscription webhooks. All three authenticate with AWS Cognito
  bearer tokens issued at auth.app.blng.ai.
url: https://raw.githubusercontent.com/api-evangelist/blng/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- speedinvest
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: freemium
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - https://blng.ai/pricing
  - https://billing.blng.ai/billing/products
  generated: '2026-08-13'
  method: probed
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-13'
image: https://cdn.sanity.io/images/4x3qe5zn/production/5354c7992cf9027bbe7400e2c4079f2c46e40cd8-4800x2520.png?w=1200&h=630
tags:
- Company
- Jewelry
- Generative AI
- Design
- Creative Tools
- Rendering
- Marketing
- Retail
- 3D Models
- Image-Generation
- Workspaces
- Billing
- OpenAPI
- AWS Cognito
tags_raw:
- Company
- Jewelry
- Generative AI
- Design
- Creative Tools
- Rendering
- Marketing
- Retail
- 3D Models
- Image Generation
- Workspaces
- Billing
- OpenAPI
- AWS Cognito
apis:
- name: BLNG User API
  description: REST API that manages BLNG users, roles and permissions, workspaces and workspace members, workspace and subscription
    invitations, organizations, SSO configuration, marketing consent, tooltips, and user subscriptions. Also exposes composite
    operations that create an organization, subscription and user in a single call. Authenticated with AWS Cognito user tokens,
    plus a client-credentials machine token for the billing integration.
  humanURL: https://users.blng.ai/
  baseURL: https://users.blng.ai
  tags:
  - Workspaces
  - User
  - Organization
  - Subscription
  - SSO
  tags_raw:
  - Workspaces
  - Users
  - Organizations
  - Subscriptions
  - SSO
  properties:
  - type: OpenAPI
    url: openapi/blng-user-api-openapi.yml
  - type: APIReference
    url: https://users.blng.ai/
  - type: Overlay
    url: overlays/blng-user-api-overlay.yaml
- name: BLNG Billing API
  description: REST API that manages BLNG payment and billing — listing Stripe products and prices, creating Stripe checkout
    sessions and customer-portal sessions, confirming checkout, and submitting enterprise "contact sales" inquiries. Also
    declares three Stripe webhook receivers for checkout completion and subscription update/delete. The product catalog endpoint
    answers unauthenticated.
  humanURL: https://billing.blng.ai/
  baseURL: https://billing.blng.ai
  tags:
  - Billing
  - Payments
  - Stripe
  - Subscription
  tags_raw:
  - Billing
  - Payments
  - Stripe
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/blng-billing-api-openapi.yml
  - type: APIReference
    url: https://billing.blng.ai/
  - type: Overlay
    url: overlays/blng-billing-api-overlay.yaml
- aid: blng:blng-chat-prompts-api
  name: Blng Chat Prompts API
  description: The Chat Prompts API from Blng — 2 operation(s) for chat prompts.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Chat Prompts
  properties:
  - type: OpenAPI
    url: openapi/blng-chat-prompts-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-composite-api
  name: Blng Composite API
  description: The Composite API from Blng — 2 operation(s) for composite.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Composite
  properties:
  - type: OpenAPI
    url: openapi/blng-composite-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-design-journey-api
  name: Blng Design Journey API
  description: The Design Journey API from Blng — 16 operation(s) for design journey.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Design Journey
  properties:
  - type: OpenAPI
    url: openapi/blng-design-journey-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-invitation-api
  name: Blng Invitation API
  description: The Invitation API from Blng — 5 operation(s) for invitation.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Invitation
  properties:
  - type: OpenAPI
    url: openapi/blng-invitation-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-journeys-api
  name: Blng Journeys API
  description: The Journeys API from Blng — 6 operation(s) for journeys.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Journeys
  properties:
  - type: OpenAPI
    url: openapi/blng-journeys-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-organization-api
  name: Blng Organization API
  description: The Organization API from Blng — 3 operation(s) for organization.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Organization
  properties:
  - type: OpenAPI
    url: openapi/blng-organization-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-prompts-api
  name: Blng Prompts API
  description: The Prompts API from Blng — 4 operation(s) for prompts.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Prompts
  properties:
  - type: OpenAPI
    url: openapi/blng-prompts-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-subscription-api
  name: Blng Subscription API
  description: The Subscription API from Blng — 4 operation(s) for subscription.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Subscription
  properties:
  - type: OpenAPI
    url: openapi/blng-subscription-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-user-subscription-api
  name: Blng User Subscription API
  description: The User Subscription API from Blng — 3 operation(s) for user subscription.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - User Subscription
  properties:
  - type: OpenAPI
    url: openapi/blng-user-subscription-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-user-tooltip-api
  name: Blng User Tooltip API
  description: The User Tooltip API from Blng — 2 operation(s) for user tooltip.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - User Tooltip
  properties:
  - type: OpenAPI
    url: openapi/blng-user-tooltip-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-webhook-api
  name: Blng Webhook API
  description: The Webhook API from Blng — 3 operation(s) for webhook.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Webhook
  properties:
  - type: OpenAPI
    url: openapi/blng-webhook-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
- aid: blng:blng-workspace-api
  name: Blng Workspace API
  description: The Workspace API from Blng — 15 operation(s) for workspace.
  humanURL: https://journeys.blng.ai/
  baseURL: https://journeys.blng.ai/v2
  tags:
  - Workspace
  properties:
  - type: OpenAPI
    url: openapi/blng-workspace-api-openapi.yml
  - type: APIReference
    url: https://journeys.blng.ai/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/blng-capability-edges.yml
  name: Blng Business Capability Map
- type: Overlay
  url: overlays/blng-journey-api-overlay.yaml
- type: AgenticAccess
  url: agentic-access/blng-agentic-access.yml
- type: DomainSecurity
  url: security/blng-domain-security.yml
- type: Website
  url: https://blng.ai
- type: Documentation
  url: https://docs.blng.ai/
- type: GettingStarted
  url: https://docs.blng.ai/getting-started/
- type: HelpCenter
  url: https://portal.blng.ai/
- type: Pricing
  url: https://blng.ai/pricing
- type: Plans
  url: plans/blng-plans-pricing.yml
- type: Blog
  url: https://blng.ai/news
- type: Support
  url: mailto:support@blng.ai
- type: SignUp
  url: https://app.blng.ai/
- type: TermsOfService
  url: https://blng.ai/terms
- type: PrivacyPolicy
  url: https://blng.ai/privacy-policy
- type: LinkedIn
  url: https://www.linkedin.com/company/blng-ai/
- type: Instagram
  url: https://www.instagram.com/blng.ai/
- type: GitHubOrganization
  url: https://github.com/blng-ai
- type: StatusPage
  url: https://status.blng.ai/
- type: Lifecycle
  url: lifecycle/blng-lifecycle.yml
- type: TrustCenter
  url: https://trust.blng.ai/
- type: TrustCenter
  url: security/blng-trust-center.yml
- type: Authentication
  url: authentication/blng-authentication.yml
- type: OAuthScopes
  url: scopes/blng-scopes.yml
- type: Conventions
  url: conventions/blng-conventions.yml
- type: ErrorCatalog
  url: errors/blng-problem-types.yml
- type: DataModel
  url: data-model/blng-data-model.yml
- type: Conformance
  url: conformance/blng-conformance.yml
- type: RateLimits
  url: rate-limits/blng-rate-limits.yml
- type: LLMsTxt
  url: llms/blng-llms.txt
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 29
  pass: local-v1
  note: Round 1 recorded "no public developer API". That was wrong. STEP 0b contract discovery on the API hosts named in the
    application's own Content-Security-Policy found three real, public, unauthenticated OpenAPI definitions served behind
    Swagger UI at journeys.blng.ai, users.blng.ai and billing.blng.ai — 88 operations and 80 schemas. BLNG still publishes
    no developer program, no SDK, no MCP server and no agent card.
x-coverage:
  state: covered
  checked: '2026-08-13'

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