Wefunder

Wefunder is the largest SEC-registered funding portal, the home of the Community Round — a Public Benefit Corporation (YC W13) that has helped 4,400+ founders raise over $1B from more than one million everyday investors since 2012, with notable raises from Mercury, Substack, and Replit. Its OAuth 2.0 Wefunder API v2 (api.wefunder.com) exposes public offerings, investments, campaigns, syndicates, write intents, and campaign attribution with signed webhooks, backed by an official TypeScript SDK (@wefunder/sdk) and PKCE-first authorization.

Wefunder publishes 13 API contracts indexed on the APIs.io network, including Activity API, Attribution API, Attribution Partners API, and 10 more. Tagged areas include Company, Crowdfunding, Equity Crowdfunding, Investing, and Fintech.

The Wefunder catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Wefunder’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

60.3/100 strong ▬ flat Agent 57/100 agent native Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreeSelf serve⚡ Free to try

1 published contract 3 Agent Skills

Company Crowdfunding Equity Crowdfunding Investing Fintech Startups FundraisingSyndicatesRegulation Crowdfunding

What this lets a business do 1

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

Developer Platform & API Ecosystem Management

BC-4270

Attribution Webhooks

POST /campaigns/{campaign_id}/attribution/webhooks POST /campaigns/{campaign_id}/attribution/webhooks/{webhook_id}/regenerate_secret

Kin Score

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

Composite quality — 60.3/100 · strong

Contract Quality 11.0 / 19

Developer Ergonomics 9.6 / 15

Access Clarity 12.6 / 15

Operational Transparency 1.0 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.5 / 15

Create-or-Update Ergonomics 2.8 / 10

Agent readiness — 57/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 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 Insurance 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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Protected Resource Metadata +5 pts — a served /.well-known/oauth-protected-resource carrying `resource` (documented), and naming its authorization_servers (verified)
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
Dry-Run / Simulate Mode +4 pts — OpenAPI: destructive operations expose a dry_run / simulate / preview / validate_only parameter
Well-Known Catalog +4 pts — common[].type includes WellKnown, APICatalog, or api-catalog

1 more unmet check in the Agent Readiness table above.

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

Operational Transparency scores 10.5 — up to +11.6 composite points
Contract Quality scores 58.8 — up to +10.3 composite points
Contract Governance scores 18.2 — up to +9.8 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/wefunder/apis.yml: open an issue on github.com/api-evangelist/wefunder 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
Private Markets and Fund Administration (ILPA, broker-dealer registration, options market-data vendors)	regulated	31.2	-	1

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 3

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.

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 13

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

Wefunder Activity API

The Activity API from Wefunder — 3 operation(s) for activity.

Wefunder Attribution API

The Attribution API from Wefunder — 2 operation(s) for attribution.

Wefunder Attribution Partners API

The Attribution Partners API from Wefunder — 5 operation(s) for attribution partners.

Wefunder Attribution Webhooks API

The Attribution Webhooks API from Wefunder — 5 operation(s) for attribution webhooks.

Wefunder Campaigns API

The Campaigns API from Wefunder — 1 operation(s) for campaigns.

Wefunder Explore API

The Explore API from Wefunder — 2 operation(s) for explore.

Wefunder Intents API

The Intents API from Wefunder — 2 operation(s) for intents.

Wefunder Investments API

The Investments API from Wefunder — 1 operation(s) for investments.

Wefunder Syndicate Deals API

The Syndicate Deals API from Wefunder — 5 operation(s) for syndicate deals.

Wefunder Syndicate Members API

The Syndicate Members API from Wefunder — 12 operation(s) for syndicate members.

Wefunder Syndicate Statistics API

The Syndicate Statistics API from Wefunder — 1 operation(s) for syndicate statistics.

Wefunder Syndicates API

The Syndicates API from Wefunder — 2 operation(s) for syndicates.

Wefunder Users API

The Users API from Wefunder — 1 operation(s) for users.

Scroll for all 13

Open Collections 13

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

Wefunder API v2 Activity API

OPEN COLLECTION

Wefunder API v2 Activity Attribution API

OPEN COLLECTION

Wefunder API v2 Activity Attribution Partners API

OPEN COLLECTION

Wefunder API v2 Activity Attribution Webhooks API

OPEN COLLECTION

Wefunder API v2 Activity Campaigns API

OPEN COLLECTION

Wefunder API v2 Activity Explore API

OPEN COLLECTION

Wefunder API v2 Activity Intents API

OPEN COLLECTION

Wefunder API v2 Activity Investments API

OPEN COLLECTION

Wefunder API v2 Activity Syndicate Deals API

OPEN COLLECTION

Wefunder API v2 Activity Syndicate Members API

OPEN COLLECTION

Wefunder API v2 Activity Syndicate Statistics API

OPEN COLLECTION

Wefunder API v2 Activity Syndicates API

OPEN COLLECTION

Wefunder API v2 Activity Users API

OPEN COLLECTION

Scroll for all 13

Agent Skills 3

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

Track campaign attribution with webhooks

AGENT SKILL

Browse public offerings on Wefunder

AGENT SKILL

Manage a Wefunder syndicate

AGENT SKILL

Wefunder API pricing

Prices published by Wefunder, read 2026-10-28 from wefunder.com/pricing.

Plan	Price
Warmup Investors	$0 Includes: Invite potential investors, share company profile, track investor interest, no commitment to raise
Private Round	$0 for founders (we charge investors) Includes: Up to 247 accredited investors via SPV; SAFE, note, or priced equity docs
Community Round	7.9% + $1K/yr Includes: Open to all investors, Reg CF compliance, SPV included
Direct on cap table	0% fee, 0% carry

Plan details, limits and sources →

Billed by: of funds successfully raised · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Wefunder Plans Pricing

4 plans

PLANS

Wefunder Price Estimates

0 plans

PLANS

Service Levels 1

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

Wefunder

SLA

FinOps 1

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

Wefunder Finops

FINOPS

Event Specifications 1

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

Wefunder Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Wefunder API Rules

64 rules · 49 errors 14 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Wefunder Api Overlay

5 actions · documentation · wefunder-openapi-original.yml

DERIVED

Security Posture 2

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

Wefunder Authentication

oauth2 · 1 scheme

SECURITY

Wefunder Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Wefunder Scopes

16 scopes · authorizationCode/clientCredentials

16 scopes

SCOPES

Agentic Access 1

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

Wefunder Agentic Access

48 operations · 24 acting · 3 human-in-the-loop

48 operations · 24 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

X-MCPServerCandidate

LLMsTxt

AgentSkill

AgenticAccess

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

Idempotency

Webhooks

DataModel

Scroll for all 7

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: wefunder
name: Wefunder
description: Wefunder is the largest SEC-registered funding portal, the home of the Community Round — a Public Benefit Corporation
  (YC W13) that has helped 4,400+ founders raise over $1B from more than one million everyday investors since 2012, with notable
  raises from Mercury, Substack, and Replit. Its OAuth 2.0 Wefunder API v2 (api.wefunder.com) exposes public offerings, investments,
  campaigns, syndicates, write intents, and campaign attribution with signed webhooks, backed by an official TypeScript SDK
  (@wefunder/sdk) and PKCE-first authorization.
url: https://raw.githubusercontent.com/api-evangelist/wefunder/refs/heads/main/apis.yml
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: free
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Free · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - scopes
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://wefunder.com/favicon.ico
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- y-combinator
x-tier: full
x-tier-reason: official public API with OpenAPI, SDK, and OAuth surface
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Crowdfunding
- Equity Crowdfunding
- Investing
- Fintech
- Startups
- Fundraising
- Syndicates
- Regulation Crowdfunding
apis:
- aid: wefunder:wefunder-activity-api
  name: Wefunder Activity API
  description: The Activity API from Wefunder — 3 operation(s) for activity.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Activity
  properties:
  - type: OpenAPI
    url: openapi/wefunder-activity-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-attribution-api
  name: Wefunder Attribution API
  description: The Attribution API from Wefunder — 2 operation(s) for attribution.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Attribution
  properties:
  - type: OpenAPI
    url: openapi/wefunder-attribution-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-attribution-partners-api
  name: Wefunder Attribution Partners API
  description: The Attribution Partners API from Wefunder — 5 operation(s) for attribution partners.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Attribution Partners
  properties:
  - type: OpenAPI
    url: openapi/wefunder-attribution-partners-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-attribution-webhooks-api
  name: Wefunder Attribution Webhooks API
  description: The Attribution Webhooks API from Wefunder — 5 operation(s) for attribution webhooks.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Attribution Webhooks
  properties:
  - type: OpenAPI
    url: openapi/wefunder-attribution-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-campaigns-api
  name: Wefunder Campaigns API
  description: The Campaigns API from Wefunder — 1 operation(s) for campaigns.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/wefunder-campaigns-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-explore-api
  name: Wefunder Explore API
  description: The Explore API from Wefunder — 2 operation(s) for explore.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Explore
  properties:
  - type: OpenAPI
    url: openapi/wefunder-explore-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-intents-api
  name: Wefunder Intents API
  description: The Intents API from Wefunder — 2 operation(s) for intents.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Intents
  properties:
  - type: OpenAPI
    url: openapi/wefunder-intents-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-investments-api
  name: Wefunder Investments API
  description: The Investments API from Wefunder — 1 operation(s) for investments.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Investment
  tags_raw:
  - Investments
  properties:
  - type: OpenAPI
    url: openapi/wefunder-investments-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-syndicate-deals-api
  name: Wefunder Syndicate Deals API
  description: The Syndicate Deals API from Wefunder — 5 operation(s) for syndicate deals.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Syndicate Deals
  properties:
  - type: OpenAPI
    url: openapi/wefunder-syndicate-deals-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-syndicate-members-api
  name: Wefunder Syndicate Members API
  description: The Syndicate Members API from Wefunder — 12 operation(s) for syndicate members.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Syndicate Members
  properties:
  - type: OpenAPI
    url: openapi/wefunder-syndicate-members-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-syndicate-statistics-api
  name: Wefunder Syndicate Statistics API
  description: The Syndicate Statistics API from Wefunder — 1 operation(s) for syndicate statistics.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Syndicate Statistics
  properties:
  - type: OpenAPI
    url: openapi/wefunder-syndicate-statistics-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-syndicates-api
  name: Wefunder Syndicates API
  description: The Syndicates API from Wefunder — 2 operation(s) for syndicates.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - Syndicates
  properties:
  - type: OpenAPI
    url: openapi/wefunder-syndicates-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
- aid: wefunder:wefunder-users-api
  name: Wefunder Users API
  description: The Users API from Wefunder — 1 operation(s) for users.
  humanURL: https://docs.wefunder.com/api-reference
  baseURL: https://api.wefunder.com
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/wefunder-users-api-openapi.yml
  - type: Documentation
    url: https://docs.wefunder.com/api-reference
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/wefunder-plans-pricing.yml
- type: CapabilityMap
  url: capabilities/wefunder-capability-edges.yml
  name: Wefunder Business Capability Map
- type: Overlay
  url: overlays/wefunder-api-overlay.yaml
- type: DomainSecurity
  url: security/wefunder-domain-security.yml
- type: Website
  url: https://wefunder.com
- type: Documentation
  url: https://docs.wefunder.com
- type: APIReference
  url: https://docs.wefunder.com/api-reference
- type: GettingStarted
  url: https://github.com/Wefunder/wefunder-node#quickstart-server-to-server
- type: Support
  url: https://help.wefunder.com
- type: Blog
  url: https://wefunder.com/blog
- type: GitHubOrganization
  url: https://github.com/Wefunder
- type: Pricing
  url: https://wefunder.com/pricing
- type: TermsOfService
  url: https://wefunder.com/terms
- type: PrivacyPolicy
  url: https://wefunder.com/terms#privacy
- type: SignUp
  url: https://wefunder.com/signup
- type: Packages
  url: packages/wefunder-packages.yml
- type: SDKs
  url: packages/wefunder-packages.yml
- type: WellKnown
  url: well-known/wefunder-well-known.yml
- type: X-MCPServerCandidate
  url: mcp/wefunder-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/wefunder-llms.txt
- type: Conformance
  url: conformance/wefunder-conformance.yml
- type: ErrorCatalog
  url: errors/wefunder-problem-types.yml
- type: Lifecycle
  url: lifecycle/wefunder-lifecycle.yml
- type: Sandbox
  url: sandbox/wefunder-sandbox.yml
- type: Conventions
  url: conventions/wefunder-conventions.yml
- type: Idempotency
  url: conventions/wefunder-conventions.yml
- type: Webhooks
  url: asyncapi/wefunder-webhooks.yml
- type: DataModel
  url: data-model/wefunder-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/wefunder-agentic-access.yml
- type: Authentication
  url: authentication/wefunder-authentication.yml
- type: OAuthScopes
  url: scopes/wefunder-scopes.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 22
  pass: local-v1

Wefunder API — frequently asked questions

Does Wefunder have an API?

Yes. APIs.io lists 13 APIs from Wefunder, including Wefunder Activity API, Wefunder Attribution API and Wefunder Attribution Partners API, and 10 more.

Is there an OpenAPI specification for the Wefunder API?

Yes. APIs.io indexes 13 OpenAPI specifications for Wefunder, each linked for download from this page.

How do I authenticate with the Wefunder API?

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

How much does the Wefunder API cost?

Wefunder publishes its prices; its Warmup Investors plan is $0 as of 2026-10-28. APIs.io lists 4 pricing plans for Wefunder, with each plan's price, limits and inclusions under Pricing on this page.

Is the Wefunder API ready for AI agents?

Wefunder has a Kin Score of 60.3 out of 100 (strong) and an Agent Readiness score of 56.6 (agent-native), scored by API Evangelist on 2026-11-06.

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