AsterPay

AsterPay, operated by AELIRA LTD in Cyprus, provides an EUR‑native facilitator for AI agent payments. It supports x402 (Coinbase) and MPP (Stripe/Tempo) protocols, converting USDC to EUR via SEPA Instant, with KYA trust scoring and MiCA alignment. Agents can pay merchants directly to their bank accounts in under 10 seconds, with transparent fees and compliance features.

AsterPay publishes 9 API contracts indexed on the APIs.io network, including AI API, Crypto API, Data API, and 6 more. Tagged areas include Payments, Fintech, Artificial Intelligence, EUR, and Settlement.

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

AsterPay’s developer surface includes CLI, authentication, documentation, API reference, getting-started guide, engineering blog, pricing, and 34 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

61.6/100 strong Agent 40/100 agent native Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 published contract 1 MCP Servers 1 Agent Skills

Payments Fintech Artificial IntelligenceEURSettlement

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 61.6/100 · strong

Contract Quality 10.9 / 21

Developer Ergonomics 10.8 / 17

Access Clarity 15.7 / 17

Operational Transparency 5.8 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 4.5 / 15

Agent readiness — 40/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 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 Payments 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% 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):

Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
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 — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's

2 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 51.5 — up to +12.1 composite points
Contract Governance scores 22.0 — up to +9.4 composite points
Developer Ergonomics scores 63.6 — up to +7.3 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/asterpay-io/apis.yml: open an issue on github.com/api-evangelist/asterpay-io 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 →

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.

Agent2Agent

measured — observed by APIs.io (flavored)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 9

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

AsterPay AI API

The ai API from AsterPay — 8 operation(s) for ai.

AsterPay Crypto API

The crypto API from AsterPay — 3 operation(s) for crypto.

AsterPay Data API

The data API from AsterPay — 39 operation(s) for data.

AsterPay Discovery API

The discovery API from AsterPay — 1 operation(s) for discovery.

AsterPay Market API

The market API from AsterPay — 5 operation(s) for market.

AsterPay Sessions API

The sessions API from AsterPay — 1 operation(s) for sessions.

AsterPay Settlement API

The settlement API from AsterPay — 3 operation(s) for settlement.

AsterPay Trust API

The trust API from AsterPay — 6 operation(s) for trust.

AsterPay Utility API

The utility API from AsterPay — 1 operation(s) for utility.

Scroll for all 9

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

AsterPay MCP Server

Remote MCP server at api.asterpay.io.

MCP SERVER

Agent Skills 1

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

agent-trust-score

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Asterpay Io Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Asterpay Io Rate Limits

1 limits

RATE LIMITS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

AsterPay API Rules

55 rules · 47 errors 6 warnings 2 info

SPECTRAL

OpenAPI Overlays 2

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.

Asterpay Io Asterpay_Io_Openapi Overlay

0 actions · update

UNRECORDED

Asterpay Io X402_Openapi Overlay

0 actions · update

UNRECORDED

Security Posture 4

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

Asterpay Io Authentication

2 schemes

SECURITY

Asterpay Io Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Asterpay Io Vulnerability Disclosure

security.txt · contact published

SECURITY

Asterpay Io Trust Center

SOC 2, GDPR

SECURITY

Agentic Access 1

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

Asterpay Io Agentic Access

68 operations · 11 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

Vocabulary

Idempotency

Conventions

ErrorCatalog

Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

CLI

ToolCrosswalk

SDKs

Packages

GitHubOrganization

GitHubOrganization

Access & Security 10

Authentication, authorization, and security posture

Compliance

Authentication

SecurityTxt

SecurityTxt

SecurityTxt

SecurityTxt

Security

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Scroll for all 10

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

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 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: asterpay-io
name: AsterPay
description: AsterPay, operated by AELIRA LTD in Cyprus, provides an EUR‑native facilitator for AI agent payments. It supports
  x402 (Coinbase) and MPP (Stripe/Tempo) protocols, converting USDC to EUR via SEPA Instant, with KYA trust scoring and MiCA
  alignment. Agents can pay merchants directly to their bank accounts in under 10 seconds, with transparent fees and compliance
  features.
url: https://artifacts.apis.io/asterpay-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-02'
  method: derived
specificationVersion: '0.20'
created: '2026-11-01'
modified: '2026-11-01'
tags:
- Payments
- Fintech
- Artificial Intelligence
- EUR
- Settlement
tags_raw:
- Payments
- FinTech
- AI
- EUR
- Settlement
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://asterpay.io/assets/asterpay-icon.svg
common:
- type: AgenticAccess
  url: agentic-access/asterpay-io-agentic-access.yml
- type: RateLimits
  url: rate-limits/asterpay-io-rate-limits.yml
- type: Plans
  url: plans/asterpay-io-plans-pricing.yml
- type: Spectral
  url: rules/asterpay-io-rules.yml
- type: Vocabulary
  url: vocabulary/asterpay-io-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: CLI
  url: cli/asterpay-io-cli.yml
- type: Idempotency
  url: conventions/asterpay-io-conventions.yml
- type: Conventions
  url: conventions/asterpay-io-conventions.yml
- type: Compliance
  url: https://asterpay.io/trust/
- type: Authentication
  url: authentication/asterpay-io-authentication.yml
- type: ErrorCatalog
  url: errors/asterpay-io-problem-types.yml
- type: Conformance
  url: conformance/asterpay-io-conformance.yml
- type: LLMsTxt
  url: llms/asterpay-io-llms.txt
- type: AgentCard
  url: a2a/asterpay-io-a2a.yml
- type: ToolCrosswalk
  url: mcp/asterpay-io-tool-crosswalk.yml
- type: MCPServer
  url: mcp/asterpay-io-mcp.yml
- type: SecurityTxt
  url: well-known/asterpay-io-x402-security.txt
- type: SecurityTxt
  url: well-known/asterpay-io-security.txt
- type: SecurityTxt
  url: well-known/asterpay-io-mta-sts-security.txt
- type: SecurityTxt
  url: well-known/asterpay-io-api-security.txt
- type: WellKnown
  url: well-known/asterpay-io-well-known.yml
- type: Hosts
  url: hosts/asterpay-io-hosts.yml
- type: Vendors
  url: vendors/asterpay-io-vendors.yml
- type: SDKs
  url: packages/asterpay-io-packages.yml
- type: Packages
  url: packages/asterpay-io-packages.yml
- type: StatusPage
  url: https://asterpay.io/status/
- type: Security
  url: https://asterpay.io/security/
- type: TrustCenter
  url: security/asterpay-io-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/asterpay-io-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/asterpay-io-domain-security.yml
- type: Website
  url: https://asterpay.io/
- type: Documentation
  url: https://asterpay.io/docs/
- type: APIReference
  url: https://asterpay.io/docs/
- type: GettingStarted
  url: https://asterpay.io/#top
- type: Blog
  url: https://asterpay.io/blog/
- type: GitHubOrganization
  url: https://github.com/AsterPay
- type: Pricing
  url: https://asterpay.io/#pricing
- type: SignUp
  url: https://app.asterpay.io/signup
- type: TermsOfService
  url: https://asterpay.io/terms
- type: PrivacyPolicy
  url: https://asterpay.io/privacy
apis:
- aid: asterpay-io:asterpay-io-ai-api
  name: AsterPay AI API
  description: The ai API from AsterPay — 8 operation(s) for ai.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Artificial Intelligence
  tags_raw:
  - ai
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-ai-api-openapi.yml
- aid: asterpay-io:asterpay-io-crypto-api
  name: AsterPay Crypto API
  description: The crypto API from AsterPay — 3 operation(s) for crypto.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Cryptocurrency
  tags_raw:
  - crypto
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-crypto-api-openapi.yml
- aid: asterpay-io:asterpay-io-data-api
  name: AsterPay Data API
  description: The data API from AsterPay — 39 operation(s) for data.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Data
  tags_raw:
  - data
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-data-api-openapi.yml
- aid: asterpay-io:asterpay-io-discovery-api
  name: AsterPay Discovery API
  description: The discovery API from AsterPay — 1 operation(s) for discovery.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Discovery
  tags_raw:
  - discovery
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-discovery-api-openapi.yml
- aid: asterpay-io:asterpay-io-market-api
  name: AsterPay Market API
  description: The market API from AsterPay — 5 operation(s) for market.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Markets
  tags_raw:
  - market
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-market-api-openapi.yml
- aid: asterpay-io:asterpay-io-sessions-api
  name: AsterPay Sessions API
  description: The sessions API from AsterPay — 1 operation(s) for sessions.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Sessions
  tags_raw:
  - sessions
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-sessions-api-openapi.yml
- aid: asterpay-io:asterpay-io-settlement-api
  name: AsterPay Settlement API
  description: The settlement API from AsterPay — 3 operation(s) for settlement.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Settlement
  tags_raw:
  - settlement
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-settlement-api-openapi.yml
- aid: asterpay-io:asterpay-io-trust-api
  name: AsterPay Trust API
  description: The trust API from AsterPay — 6 operation(s) for trust.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Trust
  tags_raw:
  - trust
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-trust-api-openapi.yml
- aid: asterpay-io:asterpay-io-utility-api
  name: AsterPay Utility API
  description: The utility API from AsterPay — 1 operation(s) for utility.
  humanURL: https://asterpay.io/docs/
  baseURL: https://x402.asterpay.io
  tags:
  - Utility
  tags_raw:
  - utility
  properties:
  - type: OpenAPI
    url: openapi/asterpay-io-utility-api-openapi.yml
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 47
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

AsterPay API — frequently asked questions

Does AsterPay have an API?

Yes. APIs.io lists 9 APIs from AsterPay, including AsterPay AI API, AsterPay Crypto API and AsterPay Data API, and 6 more.

Is there an OpenAPI specification for the AsterPay API?

Yes. APIs.io indexes 9 OpenAPI specifications for AsterPay, each linked for download from this page.

How do I authenticate with the AsterPay API?

AsterPay uses bearer-token authentication (2 schemes). The details are profiled on APIs.io as Asterpay Io Authentication.

How much does the AsterPay API cost?

APIs.io lists 3 pricing plans for AsterPay, with each plan's price, limits and inclusions under Pricing Plans on this page.

Does AsterPay have an MCP server?

Yes. APIs.io lists 1 MCP server for AsterPay: Remote MCP server at api.asterpay.io.

Is the AsterPay API ready for AI agents?

AsterPay has a Kin Score of 61.6 out of 100 (strong) and an Agent Readiness score of 39.6 (agent-native), scored by API Evangelist on 2026-11-02.

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