WritersLogic Verifiable AI Agent Hub Open Badges Verifier API
The Open Badges Verifier API from WritersLogic Verifiable AI Agent Hub — 1 operation(s) for open badges verifier.
Work with this as data
Every API here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for apis
7 MCP tools reach this
find_apisBrowse and filter every API in the catalog.get_api_artifactsOne API's artifacts, grouped by type.get_openapiThe primary OpenAPI for this API.find_similar_apisAPIs that look like this one.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This API
curl "https://apis.io/api/v1/apis/writerslogic-com:writerslogic-com-open-badges-verifier-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.
OpenAPI Specification
openapi: 3.2.0
info:
title: WritersLogic Verifiable AI Agent Hub Open Badges Verifier…
version: 2.0.0
description: Pay-per-call agents settled in USDC on Base via x402. Every response carries a signed provenance envelope.
contact:
name: WritersLogic
url: https://writerslogic.com/agents
email: agents@writerslogic.com
servers:
- url: https://agents.writerslogic.com
tags:
- name: Open Badges Verifier
paths:
/api/v1/open-badges-verifier:
post:
operationId: open_badges_verifier
summary: Open Badges 2.0 / 3.0 credential verifier
description: 'Verifies an Open Badges credential end to end and says what could and could not be confirmed. Accepts an Open Badges 3.0 credential (JSON with an eddsa-jcs-2022 proof, or a VC-JWT signed with EdDSA, ES256 or RS256), an Open Badges 2.0 assertion (hosted, or signed as an RS256 JWS), a hosted-assertion URL, or a baked PNG or SVG image. Checks the 2.0/3.0 required fields, the issuance and expiry window, the signature, that the signing key (did:key, did:web, JWKS or CryptographicKey) really belongs to the named issuer, the hosted-assertion, BadgeClass and Issuer chain with allowedOrigins and startsWith rules, and revocation (2.0 revocation lists and revoked flag, 3.0 1EdTechRevocationList and Bitstring status lists). Optionally confirms a recipient''s email or identity against the badge''s salted hash. Every check is pass, fail, unknown (for example an issuer host was unreachable) or unsupported (for example an RDF-canonicalization proof suite), and the verdict is valid only when nothing failed and nothing is left open. No model is used. Remote documents are fetched through an SSRF-guarded client, at most 12 per call, and JSON-LD contexts are never fetched.
Price: 0.05 USDC on Base (x402).'
x-x402-price-usdc: '0.05'
x-x402-amount: '50000'
x-payment-info:
protocols:
- x402
price:
mode: fixed
currency: USD
amount: '0.05'
x-audience: business
x-sample-url: https://agents.writerslogic.com/api/v1/samples/open-badges-verifier
security:
- x402: []
- apiKey: []
requestBody:
required: true
content:
application/json:
schema:
type: object
additionalProperties: false
properties:
credential:
description: The credential or assertion as a JSON object (or the same as a JSON string, or a compact JWS string).
jws:
type: string
maxLength: 1000000
description: 'A compact JWS: an Open Badges 3.0 VC-JWT or an Open Badges 2.0 signed assertion.'
url:
type: string
maxLength: 2000
description: https URL of a hosted Open Badges 2.0 assertion or a hosted 3.0 credential.
image:
type: string
maxLength: 8500000
description: 'A baked badge image, base64 (data URLs accepted): a PNG with an openbadges iTXt chunk, or an SVG with an openbadges:assertion or openbadges:credential element. Up to 6 MB decoded.'
recipientIdentity:
type: string
minLength: 1
maxLength: 320
description: 'Optional: the recipient''s email or other identity to compare against the badge''s recipient, including salted sha256$ and md5$ hashes.'
example:
credential:
'@context':
- https://www.w3.org/ns/credentials/v2
- https://purl.imsglobal.org/spec/ob/v3p0/context-3.0.3.json
id: urn:uuid:5b6d2c1e-0c1a-4a52-9a53-0c0f7a1c9e11
type:
- VerifiableCredential
- OpenBadgeCredential
issuer:
id: did:key:z6MkgAnvkP45uNxwCKeNdt6wrYkEjpYX4f7Nrd8MQqFL8Fbn
type:
- Profile
name: Example University
validFrom: '2025-01-15T00:00:00Z'
name: Example Achievement
credentialSubject:
type:
- AchievementSubject
identifier:
- type: IdentityObject
hashed: false
identityHash: learner@example.org
identityType: emailAddress
achievement:
id: https://issuer.example/achievements/1
type:
- Achievement
name: Example Achievement
description: Awarded for completing the example course.
criteria:
narrative: Complete all modules with a passing grade.
proof:
type: DataIntegrityProof
cryptosuite: eddsa-jcs-2022
created: '2025-01-15T00:00:00Z'
verificationMethod: did:key:z6MkgAnvkP45uNxwCKeNdt6wrYkEjpYX4f7Nrd8MQqFL8Fbn#z6MkgAnvkP45uNxwCKeNdt6wrYkEjpYX4f7Nrd8MQqFL8Fbn
proofPurpose: assertionMethod
proofValue: z3iyvJ3hfobNHzMPsBC39QPoo57kX7UWTBkCjL7wda4hxWDoeDeb1tQPq7HueQbbAxBEofghDqXa1rG8MEJexaUWt
recipientIdentity: learner@example.org
responses:
'200':
description: Paid result with provenance
content:
application/json:
schema:
type: object
properties:
data:
type: object
properties:
verdict:
type: string
enum:
- valid
- invalid
- unverified
description: 'invalid: at least one check failed. unverified: nothing failed but some checks are unknown or unsupported. valid: every check passed.'
verdictReason:
type: string
format:
type: string
enum:
- ob2-hosted
- ob2-signed
- ob3-credential
- ob3-jwt
- unrecognized
specVersion:
type: string
enum:
- '2.0'
- '3.0'
- unknown
source:
type: string
enum:
- json
- jws
- url
- png
- svg
checks:
type: array
items:
type: object
description: id (structure, dates, badge-class, issuer, hosted, proof-signature, issuer-key, jwt-claims, revocation, recipient), status (pass, fail, unknown, unsupported) and detail.
summary:
type: object
properties:
pass:
type: integer
fail:
type: integer
unknown:
type: integer
unsupported:
type: integer
badge:
anyOf:
- type: object
description: name, description, criteria, image, achievementId, issuer {id, name, url}, issuedOn, expires and credentialId, as read from the verified document; null when unrecognized.
- type: 'null'
proof:
anyOf:
- type: object
description: type, suite or alg, keyId and keySource of the proof that was checked; null when unrecognized.
- type: 'null'
recipient:
type: object
description: matched (true, false or null when no identity was supplied) and detail.
fetched:
type: array
items:
type: object
description: url and ok for every remote document requested.
deterministic:
type: boolean
description: 'Always true: no model is involved.'
_provenance:
type: object
description: C2PA-aligned manifest and W3C VC 2.0 (eddsa-jcs-2022) issued by the hub DID; verify at POST /api/v1/verify-provenance
required:
- data
- _provenance
'400':
description: Invalid request (no payment consumed)
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'401':
description: Invalid X-API-KEY
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
'402':
description: Payment required or invalid
content:
application/json:
schema:
type: object
description: x402 v2 PaymentRequired (also base64 in the PAYMENT-REQUIRED header)
properties:
x402Version:
type: integer
error:
type: string
code:
type: string
resource:
type: object
accepts:
type: array
items:
type: object
extensions:
type: object
'502':
description: Upstream failure; the payment is released or not settled
content:
application/json:
schema:
type: object
properties:
error:
type: string
code:
type: string
tags:
- Open Badges Verifier
components:
securitySchemes:
x402:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: x402 v2 payment payload (base64) sent after a 402 challenge
apiKey:
type: apiKey
in: header
name: X-API-KEY