Momento

Momento is a serverless data platform that provides low-latency, pay-as-you-go infrastructure without servers to provision, tune, or scale. Its core services are Momento Cache (an ephemeral serverless cache and drop-in Redis replacement), Momento Topics (a serverless publish/subscribe event bus), and Momento Leaderboards (massive, durable sorted sets). The platform is accessed over gRPC and a region-scoped HTTP API, with official SDKs for 15+ languages spanning browsers, mobile (iOS/Android/Flutter/Unity/Unreal), and 10+ server-side runtimes, plus a CLI and a Terraform provider. Authentication uses Momento API keys and short-lived disposable tokens with fine-grained permissions. Momento is backed by Bain Capital Ventures.

Momento is listed with 1 API on the APIs.io network. Tagged areas include Company, AI Infrastructure, Caching, Serverless, and Cache.

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

Momento’s developer surface includes engineering blog, documentation, API reference, getting-started guide, CLI, authentication, pricing, and 23 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

48.8/100 developing ▬ flat Agent 18/100 agent aware Front door AI 2/6 trace Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

1 API 3 Agent Skills

Company AI Infrastructure Caching Serverless Cache Pub/Sub Messaging Event Bus Leaderboards Real-Time gRPC Developer Tools

Kin Score

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

Composite quality — 48.8/100 · developing

Contract Quality 8.3 / 21

Developer Ergonomics 12.0 / 17

Access Clarity 12.1 / 17

Operational Transparency 1.2 / 11

Contract Governance 0.5 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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 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 Horizontal (data, software, accessibility, platform) 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):

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
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)
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

8 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 39.0 — up to +15.3 composite points
Operational Transparency scores 10.5 — up to +11.6 composite points
Contract Governance scores 4.5 — up to +11.5 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/momento/apis.yml: open an issue on github.com/api-evangelist/momento 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Official SDKs on Packagist, pub.dev and Hex	builds-on	33.9	-	-
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	builds-on	33.9	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 2

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.

gRPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Pub/Sub

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

Momento Cache HTTP API

Region-scoped HTTP API for reading, writing, and deleting cache items in a Momento cache without a gRPC client. Supports GET, PUT (set with TTL), and DELETE against a named cach...

Agent Skills 3

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

Cache a value and read it back

AGENT SKILL

Maintain a leaderboard and read ranks

AGENT SKILL

Publish and subscribe on a Topic

AGENT SKILL

Momento API pricing

Prices published by Momento, read 2026-10-28 from www.gomomento.com/pricing/.

Plan	Price
Momento Cache Flex	from $13 per GB-month
Momento Cache Cluster	from $0.0105 per instance-hour
Topics (Pub/sub)	from $1 per 1M operations
Valkey Router	$0.01 per GB of data transfer
Valkey Operator	$3.50 per GB-month of managed capacity
Valkey Enterprise Image	$1.50 per GB-month of configured capacity
Data Tiering Module	+$1.00
Observability Module	+$0.50

All 15 plans, limits and sources →

Billed by: gb-month · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Momento Plans Pricing

15 plans

PLANS

Momento Price Estimates

0 plans

PLANS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Momento Finops

FINOPS

Event Specifications 1

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

Momento Webhooks

ASYNCAPI

Security Posture 2

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

Momento Authentication

apiKey · 2 schemes

SECURITY

Momento Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Webhooks

Lifecycle

Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

CLI

CLI

GitHubOrganization

GitHubOrganization

Postman

Postman

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 4

The organization behind the API

Blog

BlogRSS

Website

Blog

Other 1

Properties that don't map to a standard resource type

Protobuf

Protobuf

Source (apis.yml)

aid: momento
name: Momento
description: Momento is a serverless data platform that provides low-latency, pay-as-you-go infrastructure without servers
  to provision, tune, or scale. Its core services are Momento Cache (an ephemeral serverless cache and drop-in Redis replacement),
  Momento Topics (a serverless publish/subscribe event bus), and Momento Leaderboards (massive, durable sorted sets). The
  platform is accessed over gRPC and a region-scoped HTTP API, with official SDKs for 15+ languages spanning browsers, mobile
  (iOS/Android/Flutter/Unity/Unreal), and 10+ server-side runtimes, plus a CLI and a Terraform provider. Authentication uses
  Momento API keys and short-lived disposable tokens with fine-grained permissions. Momento is backed by Bain Capital Ventures.
url: https://raw.githubusercontent.com/api-evangelist/momento/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bain-capital-ventures
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://github.com/momentohq.png
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
x-docs-hosting: github-pages
tags:
- Company
- AI Infrastructure
- Caching
- Serverless
- Cache
- Pub/Sub
- Messaging
- Event Bus
- Leaderboards
- Real-Time
- gRPC
- Developer Tools
tags_raw:
- Company
- Ai Infrastructure
- Caching
- Serverless
- Cache
- Pub/Sub
- Messaging
- Event Bus
- Leaderboards
- Real Time
- gRPC
- Developer Tools
apis:
- name: Momento Cache HTTP API
  description: Region-scoped HTTP API for reading, writing, and deleting cache items in a Momento cache without a gRPC client.
    Supports GET, PUT (set with TTL), and DELETE against a named cache, authenticated with a Momento API key passed via the
    Authorization header or a query-string token.
  humanURL: https://docs.momentohq.com/cache/develop/api-reference/http-api
  baseURL: https://api.cache.cell-1-ap-south-1-1.prod.a.momentohq.com
  tags:
  - Cache
  - HTTP
  - Serverless
  properties:
  - type: APIReference
    url: https://docs.momentohq.com/cache/develop/api-reference/http-api
  - type: Documentation
    url: https://docs.momentohq.com/cache/develop/api-reference
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/momento-plans-pricing.yml
- url: https://www.gomomento.com/blog/
  type: Blog
- url: https://www.gomomento.com/feed
  type: BlogRSS
- type: Website
  url: https://www.gomomento.com/
- type: DeveloperPortal
  url: https://docs.momentohq.com/
- type: Documentation
  url: https://docs.momentohq.com/
- type: APIReference
  url: https://docs.momentohq.com/cache/develop/api-reference
- type: GettingStarted
  url: https://docs.momentohq.com/getting-started
- type: SDKs
  url: packages/momento-packages.yml
- type: Packages
  url: packages/momento-packages.yml
- type: CLI
  url: cli/momento-cli.yml
- type: Protobuf
  url: grpc/momento-grpc.yml
- type: Authentication
  url: authentication/momento-authentication.yml
- type: Conventions
  url: conventions/momento-conventions.yml
- type: ErrorCatalog
  url: errors/momento-error-codes.yml
- type: DataModel
  url: data-model/momento-data-model.yml
- type: Webhooks
  url: asyncapi/momento-webhooks.yml
- type: Lifecycle
  url: lifecycle/momento-lifecycle.yml
- type: Conformance
  url: conformance/momento-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/momento-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/momento-llms.txt
- type: DomainSecurity
  url: security/momento-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/momentohq
- type: Blog
  url: https://www.gomomento.com/blog
- type: Pricing
  url: https://www.gomomento.com/pricing/
- type: SignUp
  url: https://console.gomomento.com/
- type: TermsOfService
  url: https://www.gomomento.com/terms-of-service/
- type: PrivacyPolicy
  url: https://www.gomomento.com/privacy-policy/
- type: Postman
  url: https://www.postman.com/gomomento
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 27
  pass: local-v1

Momento API — frequently asked questions

Does Momento have an API?

Yes. APIs.io lists 1 API from Momento, including Momento Cache HTTP API.

How do I authenticate with the Momento API?

Momento uses bearer-token authentication (apiKey · 2 schemes). The details are profiled on APIs.io as Momento Authentication.

How much does the Momento API cost?

Momento publishes its prices; its Momento Cache Flex plan is from $13 per GB-month as of 2026-10-28. APIs.io lists 15 pricing plans for Momento, with each plan's price, limits and inclusions under Pricing on this page.

Is the Momento API ready for AI agents?

Momento has a Kin Score of 48.8 out of 100 (developing) and an Agent Readiness score of 18.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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