Tesser

Tesser is a New York-based stablecoin payments infrastructure company that lets licensed financial institutions, banks, fintechs, and payment service providers move money across borders instantly and compliantly on modern stablecoin rails. Its full-stack platform handles wallet provisioning, treasury management, compliance orchestration, and reconciliation, letting institutions integrate stablecoin payments in under a month. The Tesser API (OpenAPI 3.1, v1) exposes accounts, counterparties, tenants, payments, and treasury operations (deposits, withdrawals, rebalances) secured with Auth0 client-credentials JWTs, plus Ed25519-signed webhooks, first-party TypeScript and Kotlin signer SDKs, a published Model Context Protocol server, and an open-source agentic onboarding skill. Founded by Geetha Panchapakesan (ex-MoneyGram, Visa Direct, Circle); raised a $4.5M seed in October 2025 led by Castle Island Ventures with Anthemis, Strobe Ventures, and Digital Currency Group.

Tesser publishes 14 APIs on the APIs.io network, including Accounts API, Admin API, API Keys API, and 11 more. Tagged areas include Company, Payments, Stablecoins, Cross-Border Payments, and Fintech.

The Tesser catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Tesser’s developer surface includes documentation, API reference, getting-started guide, signup flow, support, authentication, sandbox, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.3/100 developing ▬ flat Agent 44/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs 1 MCP Servers

Company Payments Stablecoins Cross-Border Payments Fintech Treasury Banking Blockchain Compliance MCP Developer Platform

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 47.3/100 · developing

Contract Quality 11.0 / 19

Developer Ergonomics 11.1 / 15

Access Clarity 5.1 / 15

Operational Transparency 1.0 / 10

Contract Governance 0.4 / 9

Discoverability 5.7 / 8

Regulatory Posture 4.7 / 15

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 44/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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 5 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Banking & Open Finance 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/.

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 github.com/api-evangelist/tesser: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 14

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

Tesser Accounts API

The Accounts API from Tesser — 5 operation(s) for accounts.

Tesser Admin API

The Admin API from Tesser — 1 operation(s) for admin.

Tesser API Keys API

The API Keys API from Tesser — 3 operation(s) for api keys.

Tesser Counterparties API

The Counterparties API from Tesser — 2 operation(s) for counterparties.

Tesser Currencies API

The Currencies API from Tesser — 1 operation(s) for currencies.

Tesser health API

The health API from Tesser — 2 operation(s) for health.

Tesser MCP API

The MCP API from Tesser — 1 operation(s) for mcp.

Tesser Networks API

The Networks API from Tesser — 1 operation(s) for networks.

Tesser Organizations API

The Organizations API from Tesser — 2 operation(s) for organizations.

Tesser Payments API

The Payments API from Tesser — 7 operation(s) for payments.

Tesser Tenants API

The Tenants API from Tesser — 2 operation(s) for tenants.

Tesser Treasury API

The Treasury API from Tesser — 12 operation(s) for treasury.

Tesser Users API

The Users API from Tesser — 2 operation(s) for users.

Tesser webhooks API

The webhooks API from Tesser — 6 operation(s) for webhooks.

Scroll for all 14

Open Collections 15

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

API Collection

OPEN COLLECTION

Tesser Accounts API

OPEN COLLECTION

Tesser Accounts Admin API

OPEN COLLECTION

Tesser Accounts API Keys API

OPEN COLLECTION

Tesser Accounts Counterparties API

OPEN COLLECTION

Tesser Accounts Currencies API

OPEN COLLECTION

Tesser Accounts health API

OPEN COLLECTION

Tesser Accounts MCP API

OPEN COLLECTION

Tesser Accounts Networks API

OPEN COLLECTION

Tesser Accounts Organizations API

OPEN COLLECTION

Tesser Accounts Payments API

OPEN COLLECTION

Tesser Accounts Tenants API

OPEN COLLECTION

Tesser Accounts Treasury API

OPEN COLLECTION

Tesser Accounts Users API

OPEN COLLECTION

Tesser Accounts webhooks API

OPEN COLLECTION

Scroll for all 15

MCP Servers 1

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

Tesser MCP Server

The Tesser MCP server exposes every public Tesser API endpoint as a tool that AI agents can discover and invoke over Streamable HTTP. It is also modeled in the OpenAPI as the PO...

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Tesser Webhooks

ASYNCAPI

Security Posture 2

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

Tesser Authentication

oauth2/http · 1 scheme

SECURITY

Tesser Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Sandbox

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

MCPServer

WellKnown

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Webhooks

Lifecycle

Conformance

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

LinkedIn

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: tesser
name: Tesser
description: Tesser is a New York-based stablecoin payments infrastructure company that lets licensed financial institutions,
  banks, fintechs, and payment service providers move money across borders instantly and compliantly on modern stablecoin
  rails. Its full-stack platform handles wallet provisioning, treasury management, compliance orchestration, and reconciliation,
  letting institutions integrate stablecoin payments in under a month. The Tesser API (OpenAPI 3.1, v1) exposes accounts,
  counterparties, tenants, payments, and treasury operations (deposits, withdrawals, rebalances) secured with Auth0 client-credentials
  JWTs, plus Ed25519-signed webhooks, first-party TypeScript and Kotlin signer SDKs, a published Model Context Protocol server,
  and an open-source agentic onboarding skill. Founded by Geetha Panchapakesan (ex-MoneyGram, Visa Direct, Circle); raised
  a $4.5M seed in October 2025 led by Castle Island Ventures with Anthemis, Strobe Ventures, and Digital Currency Group.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://raw.githubusercontent.com/tesser-payments/public/8ec11667adbdf3ba7ea626044483a24ba1a504f1/tesser-logo-Blue.svg
url: https://raw.githubusercontent.com/api-evangelist/tesser/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- anthemis
x-tier: profiled
x-tier-reason: has-public-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Payments
- Stablecoins
- Cross-Border Payments
- Fintech
- Treasury
- Banking
- Blockchain
- Compliance
- MCP
- Developer Platform
apis:
- aid: tesser:tesser-accounts-api
  name: Tesser Accounts API
  description: The Accounts API from Tesser — 5 operation(s) for accounts.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/tesser-accounts-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-admin-api
  name: Tesser Admin API
  description: The Admin API from Tesser — 1 operation(s) for admin.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Admin
  properties:
  - type: OpenAPI
    url: openapi/tesser-admin-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-api-keys-api
  name: Tesser API Keys API
  description: The API Keys API from Tesser — 3 operation(s) for api keys.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/tesser-api-keys-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-counterparties-api
  name: Tesser Counterparties API
  description: The Counterparties API from Tesser — 2 operation(s) for counterparties.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Counterparties
  properties:
  - type: OpenAPI
    url: openapi/tesser-counterparties-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-currencies-api
  name: Tesser Currencies API
  description: The Currencies API from Tesser — 1 operation(s) for currencies.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Currency
  tags_raw:
  - Currencies
  properties:
  - type: OpenAPI
    url: openapi/tesser-currencies-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-health-api
  name: Tesser health API
  description: The health API from Tesser — 2 operation(s) for health.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Health
  tags_raw:
  - health
  properties:
  - type: OpenAPI
    url: openapi/tesser-health-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-mcp-api
  name: Tesser MCP API
  description: The MCP API from Tesser — 1 operation(s) for mcp.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - MCP
  properties:
  - type: OpenAPI
    url: openapi/tesser-mcp-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-networks-api
  name: Tesser Networks API
  description: The Networks API from Tesser — 1 operation(s) for networks.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Networks
  properties:
  - type: OpenAPI
    url: openapi/tesser-networks-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-organizations-api
  name: Tesser Organizations API
  description: The Organizations API from Tesser — 2 operation(s) for organizations.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/tesser-organizations-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-payments-api
  name: Tesser Payments API
  description: The Payments API from Tesser — 7 operation(s) for payments.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Payments
  properties:
  - type: OpenAPI
    url: openapi/tesser-payments-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-tenants-api
  name: Tesser Tenants API
  description: The Tenants API from Tesser — 2 operation(s) for tenants.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Tenants
  properties:
  - type: OpenAPI
    url: openapi/tesser-tenants-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-treasury-api
  name: Tesser Treasury API
  description: The Treasury API from Tesser — 12 operation(s) for treasury.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Treasury
  properties:
  - type: OpenAPI
    url: openapi/tesser-treasury-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-users-api
  name: Tesser Users API
  description: The Users API from Tesser — 2 operation(s) for users.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/tesser-users-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
- aid: tesser:tesser-webhooks-api
  name: Tesser webhooks API
  description: The webhooks API from Tesser — 6 operation(s) for webhooks.
  humanURL: https://docs.tesser.xyz
  baseURL: https://api.tesser.xyz
  tags:
  - Webhook
  tags_raw:
  - webhooks
  properties:
  - type: OpenAPI
    url: openapi/tesser-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.tesser.xyz
  - type: APIReference
    url: https://docs.tesser.xyz/api/v1/schema.json
  - type: GettingStarted
    url: https://docs.tesser.xyz/overviews/authentication
  - type: Authentication
    url: authentication/tesser-authentication.yml
common:
- type: CapabilityMap
  url: capabilities/tesser-capability-edges.yml
  name: Tesser Business Capability Map
- type: DomainSecurity
  url: security/tesser-domain-security.yml
- type: DeveloperPortal
  url: https://docs.tesser.xyz
- type: Documentation
  url: https://docs.tesser.xyz
- type: APIReference
  url: https://docs.tesser.xyz/api/v1/schema.json
- type: GettingStarted
  url: https://docs.tesser.xyz/overviews/authentication
- type: Website
  url: https://tesser.xyz
- type: SignUp
  url: https://app.tesser.xyz
- type: Login
  url: https://app.tesser.xyz
- type: Support
  url: https://tesser.xyz/#contact
- type: TermsOfService
  url: https://tesser.xyz/legal/terms-of-service
- type: PrivacyPolicy
  url: https://tesser.xyz/legal/privacy-policy
- type: GitHubOrganization
  url: https://github.com/tesser-payments
- type: LinkedIn
  url: https://www.linkedin.com/company/tesserpayments/
- type: OpenAPI
  url: openapi/_original/tesser-openapi-original.json
- type: LLMsTxt
  url: llms/tesser-llms.txt
- type: Authentication
  url: authentication/tesser-authentication.yml
- type: MCPServer
  url: mcp/tesser-mcp.yml
- type: WellKnown
  url: well-known/tesser-well-known.yml
- type: Packages
  url: packages/tesser-packages.yml
- type: SDKs
  url: packages/tesser-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Conventions
  url: conventions/tesser-conventions.yml
- type: ErrorCatalog
  url: errors/tesser-error-codes.yml
- type: Webhooks
  url: asyncapi/tesser-webhooks.yml
- type: Sandbox
  url: sandbox/tesser-sandbox.yml
- type: Lifecycle
  url: lifecycle/tesser-lifecycle.yml
- type: Conformance
  url: conformance/tesser-conformance.yml
- type: DataModel
  url: data-model/tesser-data-model.yml
- type: Overlay
  url: overlays/tesser-openapi-overlay.yaml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 22
  pass: local-v1

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