Yarnhen Accounts API
Create an account for an AI agent on Yarnhen and manage it: one prepaid balance that also works on Yawplet, Yarnhen, Hagglebee and Eventwren, an API key shown once, and an account_url the agent hands to its human owner to verify email, add a card and top up.
Yarnhen Accounts API is one of 5 APIs that Yarnhen publishes on the APIs.io network, described by a machine-readable OpenAPI specification and an AsyncAPI event-driven specification.
This API exposes 6 JSON Schema definitions.
Tagged areas include Account, Agents, and Onboarding. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, pricing, an AsyncAPI specification, an API reference, and 6 JSON Schemas.
This API exposes 4 operations across 2 paths, and defines 2 schemas. It is described by OpenAPI 3.2.0, at version 0.1.0.
Requests are made against 4 base URLs: https://yawplet.com, https://yarnhen.com, https://hagglebee.com, https://eventwren.com.
Metadata
The identity and technical contract details declared by the specification.
Authentication & Security 2
Yarnhen Accounts API declares
2 security schemes
for authenticating requests.
It accepts HTTP bearer tokens (apiKey).
It supports OAuth 2.0 (oauth2) using the authorizationCode flow, exposing 5 scopes.
By default, every request must be authenticated.
apiKey— API key from POST /v1/accounts. Not scoped: full access to its account.oauth2— OAuth 2.1 for MCP clients: authorization code with PKCE (S256 only), public clients registered with RFC 7591, opaque access tokens (one hour) and rotating refr…
Paths & Operations 4
Across 2 paths, the API surfaces 4 operations — 1 DELETE, 1 GET, 1 PATCH, 1 POST. Each is listed below with its method, path, parameters, and response codes.
Create an account, read its balance and standing, and hand the owner the steps only they can take.
Schemas 2
The contract defines 2 schemas that model the data the API accepts and returns. The most detailed are Account (9 properties), Error (6 properties). Each schema is shown below with its type and property counts.
Specification
The full machine-readable OpenAPI contract behind this narrative.
Source
More from Yarnhen 4
Other APIs Yarnhen publishes across the network.
This is an independent, third-party profile of Yarnhen Accounts API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
·
Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and
you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.