Nexi

Nexi is a European payment technology company offering a wide range of digital payment solutions for merchants, banks, and consumers. It provides services such as card issuing, open banking, e‑commerce payments, and blockchain‑based solutions, operating across multiple countries in Europe. Nexi focuses on innovation in the PayTech sector, delivering secure, scalable, and compliant payment infrastructures for businesses of all sizes.

Nexi is listed with 9 APIs on the APIs.io network, including Build API, Contract API, and 7 more. Tagged areas include Company, Payments, Fintech, and Europe.

The Nexi catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Nexi’s developer surface includes getting-started guide, documentation, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

20.9/100 emerging ▼ -7.0 Agent 17/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

9 APIs

Company Payments Fintech Europe

Kin Score

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

Composite quality — 20.9/100 · emerging

Contract Quality 3.8 / 19

Developer Ergonomics 2.3 / 15

Access Clarity 1.6 / 15

Operational Transparency 0.8 / 10

Contract Governance 3.2 / 9

Discoverability 4.4 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 0 / 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 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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

11 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 20.2 — up to +20.0 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 15.5 — up to +16.9 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/nexi/apis.yml: open an issue on github.com/api-evangelist/nexi 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 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 9

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

Nexi API

API reference for Nexi's payment services

Nexi Build API

The Build API from Nexi — 1 operation(s) for build.

Nexi Contract API

The Contract API from Nexi — 1 operation(s) for contract.

Nexi Contracts API

The Contracts API from Nexi — 2 operation(s) for contracts.

Nexi Nexi API

The Nexi API API from Nexi — 1 operation(s) for nexi api.

Nexi Operations API

The Operations API from Nexi — 4 operation(s) for operations.

Nexi Orders API

The Orders API from Nexi — 8 operation(s) for orders.

Nexi Paybylink API

The Paybylink API from Nexi — 1 operation(s) for paybylink.

Nexi Payment Methods API

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

Scroll for all 9

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Nexi Context

2 classes · 2 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Nexi API Rules

11 rules · 9 errors 1 warnings 1 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

GetApiV1OrdersOrderidResponse

1 properties

JSON SCHEMA

GetApiV1OrdersResponse

1 properties

JSON SCHEMA

Security Posture 1

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

Nexi Domain Security

TLSv1.2 · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

DeclineCodes

DeclineCodes

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Newsroom

Newsroom

Website

Website

Other 3

Properties that don't map to a standard resource type

Vendors

Vendors

Hosts

Hosts

Leadership

Leadership

Source (apis.yml)

aid: nexi
name: Nexi
description: Nexi is a European payment technology company offering a wide range of digital payment solutions for merchants,
  banks, and consumers. It provides services such as card issuing, open banking, e‑commerce payments, and blockchain‑based
  solutions, operating across multiple countries in Europe. Nexi focuses on innovation in the PayTech sector, delivering secure,
  scalable, and compliant payment infrastructures for businesses of all sizes.
url: https://raw.githubusercontent.com/api-evangelist/nexi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:tag-qc
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-15 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-10-14'
modified: '2026-10-14'
tags:
- Company
- Payments
- Fintech
- Europe
tags_raw:
- Company
- Payments
- FinTech
- Europe
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Vendors
  url: vendors/nexi-vendors.yml
- type: Spectral
  url: rules/nexi-rules.yml
- type: JSONLD
  url: json-ld/nexi-context.jsonld
- type: Vocabulary
  url: vocabulary/nexi-vocabulary.yml
- type: DataModel
  url: data-model/nexi-data-model.yml
- type: DeclineCodes
  url: errors/nexi-decline-codes.yml
- type: Conformance
  url: conformance/nexi-conformance.yml
- type: LLMsTxt
  url: llms/nexi-llms.txt
- type: Hosts
  url: hosts/nexi-hosts.yml
- type: TermsOfService
  url: https://www.nexigroup.com/en/legal-notice/
- type: StatusPage
  url: https://developer.nexigroup.com/status
- type: PrivacyPolicy
  url: https://www.nexigroup.com/en/privacy-policy/
- type: Newsroom
  url: https://www.nexigroup.com/en/media-relations/news/
- type: Leadership
  url: https://www.nexigroup.com/en/group/governance/management/
- type: GettingStarted
  url: https://docs.paygate.nexigroup.com/nexi-developer/setup-fraud-prevention-optional
- type: Documentation
  url: https://developer.nexigroup.com/
- type: DeveloperPortal
  url: https://developer.npay.eu/nexi-pos-api/docs/
- type: DomainSecurity
  url: security/nexi-domain-security.yml
- type: Website
  url: https://www.nexigroup.com
apis:
- name: Nexi API
  description: API reference for Nexi's payment services
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: null
  x-coverage:
    state: unreadable
    reason: js-rendered-docs
    detail: API reference pages are rendered via JavaScript and no machine‑readable OpenAPI spec was found.
    evidence:
    - url: https://developer.nexigroup.com/xpaycee/en-EU/api/
      status: 200
    checked: '2026-10-15'
  aid: nexi:nexi-api
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/nexi-openapi-generated.yml
    x-provenance: generated
- aid: nexi:nexi-build-api
  name: Nexi Build API
  description: The Build API from Nexi — 1 operation(s) for build.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Builds
  tags_raw:
  - Build
  properties:
  - type: OpenAPI
    url: openapi/nexi-build-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-contract-api
  name: Nexi Contract API
  description: The Contract API from Nexi — 1 operation(s) for contract.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Contract
  properties:
  - type: OpenAPI
    url: openapi/nexi-contract-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-contracts-api
  name: Nexi Contracts API
  description: The Contracts API from Nexi — 2 operation(s) for contracts.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Contracts
  properties:
  - type: OpenAPI
    url: openapi/nexi-contracts-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-nexi-api-api
  name: Nexi Nexi API
  description: The Nexi API API from Nexi — 1 operation(s) for nexi api.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Nexi API
  properties:
  - type: OpenAPI
    url: openapi/nexi-nexi-api-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-operations-api
  name: Nexi Operations API
  description: The Operations API from Nexi — 4 operation(s) for operations.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags: []
  tags_raw:
  - Operations
  properties:
  - type: OpenAPI
    url: openapi/nexi-operations-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-orders-api
  name: Nexi Orders API
  description: The Orders API from Nexi — 8 operation(s) for orders.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Order
  tags_raw:
  - Orders
  properties:
  - type: OpenAPI
    url: openapi/nexi-orders-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-paybylink-api
  name: Nexi Paybylink API
  description: The Paybylink API from Nexi — 1 operation(s) for paybylink.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Pay by Link
  tags_raw:
  - Paybylink
  properties:
  - type: OpenAPI
    url: openapi/nexi-paybylink-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
- aid: nexi:nexi-payment-methods-api
  name: Nexi Payment Methods API
  description: The Payment Methods API from Nexi — 1 operation(s) for payment methods.
  humanURL: https://developer.nexigroup.com/xpaycee/en-EU/api/
  baseURL: https://xpaysandbox.nexigroup.com/api/phoenix-0.0/psp
  tags:
  - Payment Methods
  properties:
  - type: OpenAPI
    url: openapi/nexi-payment-methods-api-openapi.yml
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-response-schema.json
  - type: JSONSchema
    url: json-schema/nexi-get-api-v1-orders-orderid-response-schema.json
x-coverage:
  state: none
  reason: no-developer-program
  method: derived
  generated: '2026-10-15'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes no developer documentation host and no machine-readable contract on its own domain
  evidence:
  - url: https://docs.paygate.nexigroup.com/mcp
    status: 403
  - url: https://www.nexigroup.com
    status: 200
x-enrichment:
  date: '2026-10-15'
  status: enriched
  artifacts_added: 16
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Nexi API — frequently asked questions

Does Nexi have an API?

Yes. APIs.io lists 9 APIs from Nexi, including Nexi API, Nexi Build API and Nexi Contract API, and 6 more.

Is there an OpenAPI specification for the Nexi API?

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

Is the Nexi API ready for AI agents?

Nexi has a Kin Score of 20.9 out of 100 (emerging) and an Agent Readiness score of 17.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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