Reverb

Reverb is a marketplace for musicians to buy and sell new, used, and vintage musical instruments and gear, owned by Etsy. The Reverb API is a HATEOAS hypermedia REST API using application/hal+json, with interactive Swagger documentation and an X-Auth-Token header authentication scheme.

Reverb publishes 21 API contracts indexed on the APIs.io network, including REST API, Accounts API, Articles API, and 18 more. Tagged areas include Marketplace, Music, Instruments, and E-Commerce.

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

Reverb’s developer surface includes engineering blog, authentication, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

26.5/100 thin ▬ flat Agent 20/100 agent aware Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Marketplace Music Instruments E-Commerce

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 26.5/100 · thin

Contract Quality 8.5 / 19

Developer Ergonomics 3.6 / 15

Access Clarity 0.6 / 15

Operational Transparency 1.9 / 10

Contract Governance 1.2 / 9

Discoverability 4.3 / 8

Regulatory Posture 2.6 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · 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 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 Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

9 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 4.3 — up to +19.1 composite points Ask about this →
Developer Ergonomics scores 23.8 — up to +15.2 composite points Ask about this →
Contract Quality scores 45.5 — up to +13.6 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/reverb/apis.yml: open an issue on github.com/api-evangelist/reverb 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
MACH & Headless Commerce	standard	34.5 (thin)	-	-
APIs.guru OpenAPI Directory (API definition directory)	standard	34.5 (thin)	-	-

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 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 21

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

Reverb REST API

HATEOAS hypermedia REST API at https://reverb.com/api using application/hal+json. Auth via POST /api/auth/tokens to obtain a token used in X-Auth-Token header. Endpoints exposed...

Reverb Accounts API

The Accounts API from Reverb — 1 operation(s) for accounts.

Reverb Articles API

The Articles API from Reverb — 2 operation(s) for articles.

Reverb Auth API

The Auth API from Reverb — 4 operation(s) for auth.

Reverb Autocomplete API

The Autocomplete API from Reverb — 1 operation(s) for autocomplete.

Reverb Autosuggest API

The Autosuggest API from Reverb — 1 operation(s) for autosuggest.

Reverb Braintree API

The Braintree API from Reverb — 1 operation(s) for braintree.

Reverb Cart API

The Cart API from Reverb — 1 operation(s) for cart.

Reverb Categories API

The Categories API from Reverb — 2 operation(s) for categories.

Reverb Collections API

The Collections API from Reverb — 1 operation(s) for collections.

Reverb Countries API

The Countries API from Reverb — 1 operation(s) for countries.

Reverb Currencies API

The Currencies API from Reverb — 2 operation(s) for currencies.

Reverb Listings API

The Listings API from Reverb — 1 operation(s) for listings.

Reverb My API

The My API from Reverb — 21 operation(s) for my.

Reverb Payment Methods API

The Payment Methods API from Reverb — 1 operation(s) for payment methods.

Reverb Priceguide API

The Priceguide API from Reverb — 1 operation(s) for priceguide.

Reverb Push Notifications API

The Push Notifications API from Reverb — 1 operation(s) for push notifications.

Reverb API

The Reverb API API from Reverb — 1 operation(s) for reverb api.

Reverb Shipping API

The Shipping API from Reverb — 2 operation(s) for shipping.

Reverb Shop API

The Shop API from Reverb — 3 operation(s) for shop.

Reverb Wants API

The Wants API from Reverb — 1 operation(s) for wants.

Scroll for all 21

Open Collections 21

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

Reverb Accounts API

OPEN COLLECTION

Reverb Accounts Articles API

OPEN COLLECTION

Reverb Accounts Auth API

OPEN COLLECTION

Reverb Accounts Autocomplete API

OPEN COLLECTION

Reverb Accounts Autosuggest API

OPEN COLLECTION

Reverb Accounts Braintree API

OPEN COLLECTION

Reverb Accounts Cart API

OPEN COLLECTION

Reverb Accounts Categories API

OPEN COLLECTION

Reverb Accounts Collections API

OPEN COLLECTION

Reverb Accounts Countries API

OPEN COLLECTION

Reverb Accounts Currencies API

OPEN COLLECTION

Reverb Accounts Listings API

OPEN COLLECTION

Reverb Accounts My API

OPEN COLLECTION

Reverb Accounts Payment Methods API

OPEN COLLECTION

Reverb Accounts Priceguide API

OPEN COLLECTION

Reverb Accounts Push Notifications API

OPEN COLLECTION

Reverb Accounts Reverb API API

OPEN COLLECTION

Reverb Accounts Shipping API

OPEN COLLECTION

Reverb Accounts Shop API

OPEN COLLECTION

Reverb Accounts Wants API

OPEN COLLECTION

Reverb API

OPEN COLLECTION

Scroll for all 21

Reverb API pricing

Not yet checked against Reverb's own pricing page. Compiled by API Evangelist on 2026-05-08 from reverb.com/page/api; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Reverb Developer free	—
Seller Fees paid	—

Plan details, limits and sources →

Rate limits

Default REST: not publicly documented requests

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

Pricing Plans 1

Published pricing tiers and plan structures.

Reverb Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Reverb Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Reverb Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Reverb API Rules

52 rules · 48 error-severity 2 warn-severity 2 info-severity

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.

Reverb Articles Api Certification Overlay

1 action · security · reverb-articles-api-openapi.yml

DERIVED

Security Posture 3

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

Reverb Authentication

apiKey · 1 scheme

SECURITY

Reverb Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Reverb Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Reverb Agentic Access

49 operations · 4 acting

AGENTIC

Resources

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 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

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

Blog

Blog

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

Developer

Developer

Source (apis.yml)

aid: reverb
url: https://raw.githubusercontent.com/api-evangelist/reverb/refs/heads/main/apis.yml
name: Reverb
kind: company
description: Reverb is a marketplace for musicians to buy and sell new, used, and vintage musical instruments and gear, owned
  by Etsy. The Reverb API is a HATEOAS hypermedia REST API using application/hal+json, with interactive Swagger documentation
  and an X-Auth-Token header authentication scheme.
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: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/reverb.png
tags:
- Marketplace
- Music
- Instruments
- E-Commerce
tags_raw:
- Marketplace
- Music
- Instruments
- Ecommerce
created: '2026-05-08'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: reverb:rest-api
  name: Reverb REST API
  description: HATEOAS hypermedia REST API at https://reverb.com/api using application/hal+json. Auth via POST /api/auth/tokens
    to obtain a token used in X-Auth-Token header. Endpoints exposed via _links include accounts, articles, listings, autocomplete,
    autosuggest, cart, categories, collections, currencies, payment_methods, price_guides, my account, my orders, my listings,
    etc.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - REST
  - HATEOAS
  - HAL+JSON
  properties:
  - type: Documentation
    url: https://reverb.com/page/api
  - type: Swagger
    url: https://reverb.com/swagger
  - type: Authentication
    url: https://reverb.com/page/api
- aid: reverb:reverb-accounts-api
  name: Reverb Accounts API
  description: The Accounts API from Reverb — 1 operation(s) for accounts.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/reverb-accounts-api-openapi.yml
- aid: reverb:reverb-articles-api
  name: Reverb Articles API
  description: The Articles API from Reverb — 2 operation(s) for articles.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Articles
  properties:
  - type: OpenAPI
    url: openapi/reverb-articles-api-openapi.yml
- aid: reverb:reverb-auth-api
  name: Reverb Auth API
  description: The Auth API from Reverb — 4 operation(s) for auth.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Authentication
  tags_raw:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/reverb-auth-api-openapi.yml
- aid: reverb:reverb-autocomplete-api
  name: Reverb Autocomplete API
  description: The Autocomplete API from Reverb — 1 operation(s) for autocomplete.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Autocomplete
  properties:
  - type: OpenAPI
    url: openapi/reverb-autocomplete-api-openapi.yml
- aid: reverb:reverb-autosuggest-api
  name: Reverb Autosuggest API
  description: The Autosuggest API from Reverb — 1 operation(s) for autosuggest.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Autosuggest
  properties:
  - type: OpenAPI
    url: openapi/reverb-autosuggest-api-openapi.yml
- aid: reverb:reverb-braintree-api
  name: Reverb Braintree API
  description: The Braintree API from Reverb — 1 operation(s) for braintree.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Braintree
  properties:
  - type: OpenAPI
    url: openapi/reverb-braintree-api-openapi.yml
- aid: reverb:reverb-cart-api
  name: Reverb Cart API
  description: The Cart API from Reverb — 1 operation(s) for cart.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Cart
  properties:
  - type: OpenAPI
    url: openapi/reverb-cart-api-openapi.yml
- aid: reverb:reverb-categories-api
  name: Reverb Categories API
  description: The Categories API from Reverb — 2 operation(s) for categories.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Categories
  properties:
  - type: OpenAPI
    url: openapi/reverb-categories-api-openapi.yml
- aid: reverb:reverb-collections-api
  name: Reverb Collections API
  description: The Collections API from Reverb — 1 operation(s) for collections.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Collection
  tags_raw:
  - Collections
  properties:
  - type: OpenAPI
    url: openapi/reverb-collections-api-openapi.yml
- aid: reverb:reverb-countries-api
  name: Reverb Countries API
  description: The Countries API from Reverb — 1 operation(s) for countries.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Countries
  properties:
  - type: OpenAPI
    url: openapi/reverb-countries-api-openapi.yml
- aid: reverb:reverb-currencies-api
  name: Reverb Currencies API
  description: The Currencies API from Reverb — 2 operation(s) for currencies.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Currency
  tags_raw:
  - Currencies
  properties:
  - type: OpenAPI
    url: openapi/reverb-currencies-api-openapi.yml
- aid: reverb:reverb-listings-api
  name: Reverb Listings API
  description: The Listings API from Reverb — 1 operation(s) for listings.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Listings
  properties:
  - type: OpenAPI
    url: openapi/reverb-listings-api-openapi.yml
- aid: reverb:reverb-my-api
  name: Reverb My API
  description: The My API from Reverb — 21 operation(s) for my.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - My
  properties:
  - type: OpenAPI
    url: openapi/reverb-my-api-openapi.yml
- aid: reverb:reverb-payment-methods-api
  name: Reverb Payment Methods API
  description: The Payment Methods API from Reverb — 1 operation(s) for payment methods.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Payment Methods
  properties:
  - type: OpenAPI
    url: openapi/reverb-payment-methods-api-openapi.yml
- aid: reverb:reverb-priceguide-api
  name: Reverb Priceguide API
  description: The Priceguide API from Reverb — 1 operation(s) for priceguide.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Priceguide
  properties:
  - type: OpenAPI
    url: openapi/reverb-priceguide-api-openapi.yml
- aid: reverb:reverb-push-notifications-api
  name: Reverb Push Notifications API
  description: The Push Notifications API from Reverb — 1 operation(s) for push notifications.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Push Notifications
  properties:
  - type: OpenAPI
    url: openapi/reverb-push-notifications-api-openapi.yml
- aid: reverb:reverb-reverb-api-api
  name: Reverb API
  description: The Reverb API API from Reverb — 1 operation(s) for reverb api.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Reverb API
  properties:
  - type: OpenAPI
    url: openapi/reverb-reverb-api-api-openapi.yml
- aid: reverb:reverb-shipping-api
  name: Reverb Shipping API
  description: The Shipping API from Reverb — 2 operation(s) for shipping.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Shipping
  properties:
  - type: OpenAPI
    url: openapi/reverb-shipping-api-openapi.yml
- aid: reverb:reverb-shop-api
  name: Reverb Shop API
  description: The Shop API from Reverb — 3 operation(s) for shop.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Shop
  properties:
  - type: OpenAPI
    url: openapi/reverb-shop-api-openapi.yml
- aid: reverb:reverb-wants-api
  name: Reverb Wants API
  description: The Wants API from Reverb — 1 operation(s) for wants.
  humanURL: https://reverb.com/page/api
  baseURL: https://reverb.com/api
  tags:
  - Wants
  properties:
  - type: OpenAPI
    url: openapi/reverb-wants-api-openapi.yml
common:
- url: https://reverb.com/news
  type: Blog
- type: AgenticAccess
  url: agentic-access/reverb-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/reverb-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/reverb-domain-security.yml
- type: Authentication
  url: authentication/reverb-authentication.yml
- type: GitHubOrganization
  url: https://github.com/reverbdotcom
- type: LinkedIn
  url: https://www.linkedin.com/company/reverbdotcom
- type: Website
  url: https://reverb.com/
- type: Developer
  url: https://reverb.com/page/api
- type: Plans
  url: plans/reverb-plans-pricing.yml
- type: RateLimits
  url: rate-limits/reverb-rate-limits.yml
- type: FinOps
  url: finops/reverb-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Reverb API — frequently asked questions

Does Reverb have an API?

Yes. APIs.io lists 21 APIs from Reverb, including Reverb REST API, Reverb Accounts API and Reverb Articles API, and 18 more.

Is there an OpenAPI specification for the Reverb API?

Yes. APIs.io indexes 21 OpenAPI specifications for Reverb, each linked for download from this page.

How do I authenticate with the Reverb API?

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

How much does the Reverb API cost?

APIs.io lists 2 pricing plans for Reverb, with each plan's price, limits and inclusions under Pricing on this page.

Is the Reverb API ready for AI agents?

Reverb has a Kin Score of 26.5 out of 100 (thin) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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