Blocksize

Blocksize provides real‑time aggregated crypto and tokenized asset market data from over 70 exchanges, delivering reference price feeds through eight oracle networks via a single API. Founded in 2018, the Frankfurt‑based company offers free trials and tiered pricing for developers and enterprises.

Blocksize publishes 29 API contracts indexed on the APIs.io network, including Account Plans API, Batch API, Bidask API, and 26 more. Tagged areas include Market Data, Tokenized Assets, Oracle Networks, Financial Institutions, and Developers.

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

Blocksize’s developer surface includes API reference, getting-started guide, engineering blog, pricing, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

33.8/100 thin Agent 51/100 agent ready Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 published contract 1 Agent Skills

Market DataTokenized AssetsOracle NetworksFinancial Institutions Developers

Kin Score

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

Composite quality — 33.8/100 · thin

Contract Quality 9.3 / 21

Developer Ergonomics 3.7 / 17

Access Clarity 7.2 / 17

Operational Transparency 0.3 / 11

Contract Governance 2.2 / 10

Discoverability 5.7 / 9

Regulatory Posture 3.5 / 15

Agent readiness — 51/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 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 Securities & Market Data 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
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)
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

3 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 21.9 — up to +15.6 composite points
Contract Quality scores 43.9 — up to +14.0 composite points
Operational Transparency scores 2.6 — up to +12.7 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/blocksize-info/apis.yml: open an issue on github.com/api-evangelist/blocksize-info 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.

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 29

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

Blocksize Market Data API

Institutional-grade real-time market data gateway for autonomous AI agents.

Blocksize Account Plans API

The Account Plans API from Blocksize — 2 operation(s) for account plans.

Blocksize Batch API

The Batch API from Blocksize — 1 operation(s) for batch.

Blocksize Bidask API

The Bidask API from Blocksize — 1 operation(s) for bidask.

Blocksize Briefs API

The Briefs API from Blocksize — 1 operation(s) for briefs.

Blocksize Cache API

The Cache API from Blocksize — 1 operation(s) for cache.

Blocksize Capabilities API

The Capabilities API from Blocksize — 1 operation(s) for capabilities.

Blocksize Checks API

The Checks API from Blocksize — 1 operation(s) for checks.

Blocksize Coverage API

The Coverage API from Blocksize — 1 operation(s) for coverage.

Blocksize Fx API

The Fx API from Blocksize — 1 operation(s) for fx.

Blocksize Health API

The Health API from Blocksize — 1 operation(s) for health.

Blocksize Indicators API

The Indicators API from Blocksize — 2 operation(s) for indicators.

Blocksize Instruments API

The Instruments API from Blocksize — 1 operation(s) for instruments.

Blocksize MCP API

The Mcp API from Blocksize — 1 operation(s) for mcp.

Blocksize Metal API

The Metal API from Blocksize — 1 operation(s) for metal.

Blocksize Monitors API

The Monitors API from Blocksize — 2 operation(s) for monitors.

Blocksize Previews API

The Previews API from Blocksize — 1 operation(s) for previews.

Blocksize Products API

The Products API from Blocksize — 1 operation(s) for products.

Blocksize Provenance API

The Provenance API from Blocksize — 1 operation(s) for provenance.

Blocksize Receipts API

The Receipts API from Blocksize — 1 operation(s) for receipts.

Blocksize Rwa API

The Rwa API from Blocksize — 42 operation(s) for rwa.

Blocksize Samples API

The Samples API from Blocksize — 4 operation(s) for samples.

Blocksize Search API

The Search API from Blocksize — 1 operation(s) for search.

Blocksize Signals API

The Signals API from Blocksize — 2 operation(s) for signals.

Blocksize Snapshots API

The Snapshots API from Blocksize — 1 operation(s) for snapshots.

Blocksize State API

The State API from Blocksize — 1 operation(s) for state.

Blocksize Vwap API

The Vwap API from Blocksize — 1 operation(s) for vwap.

Blocksize Vwap24h API

The Vwap24h API from Blocksize — 1 operation(s) for vwap24h.

Blocksize Vwap30m API

The Vwap30m API from Blocksize — 1 operation(s) for vwap30m.

Scroll for all 29

Agent Skills 1

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

market-data

AGENT SKILL

Blocksize API pricing

Prices published by Blocksize, read 2026-11-02 from blocksize.info/pricing/.

Plan	Price
Developer	€49/ month
Start-Up	€299/ month
Business	€799/ month
Enterprise	Talk to us

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Blocksize Info Plans Pricing

4 plans

PLANS

Semantic Vocabularies 1

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

Blocksize Info Context

2 classes · 6 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Blocksize API Rules

43 rules · 34 errors 5 warnings 4 info

SPECTRAL

Security Posture 1

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

Blocksize Info Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Blocksize Info Agentic Access

76 operations · 21 acting · 1 human-in-the-loop

76 operations · 21 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

Pricing

Pricing

Company 3

The organization behind the API

Newsroom

Newsroom

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: blocksize-info
name: Blocksize
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://blocksize.info/images/thumbnail.jpg
description: Blocksize provides real‑time aggregated crypto and tokenized asset market data from over 70 exchanges, delivering
  reference price feeds through eight oracle networks via a single API. Founded in 2018, the Frankfurt‑based company offers
  free trials and tiered pricing for developers and enterprises.
url: https://artifacts.apis.io/blocksize-info/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Market Data
- Tokenized Assets
- Oracle Networks
- Financial Institutions
- Developers
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/blocksize-info-agentic-access.yml
- type: Plans
  url: plans/blocksize-info-plans-pricing.yml
- type: Spectral
  url: rules/blocksize-info-rules.yml
- type: JSONLD
  url: json-ld/blocksize-info-context.jsonld
- type: Vocabulary
  url: vocabulary/blocksize-info-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/blocksize-info-data-model.yml
- type: ErrorCatalog
  url: errors/blocksize-info-problem-types.yml
- type: Conformance
  url: conformance/blocksize-info-conformance.yml
- type: LLMsTxt
  url: llms/blocksize-info-llms.txt
- type: WellKnown
  url: well-known/blocksize-info-well-known.yml
- type: Hosts
  url: hosts/blocksize-info-hosts.yml
- type: Vendors
  url: vendors/blocksize-info-vendors.yml
- type: TermsOfService
  url: https://blocksize.info/terms-conditions-data/
- type: Newsroom
  url: https://blocksize.info/media/
- type: GitHubOrganization
  url: https://github.com/Blocksize-Capital-GmbH/
- type: DeveloperPortal
  url: https://blocksize.info/solutions/developers/
- type: DomainSecurity
  url: security/blocksize-info-domain-security.yml
- type: Website
  url: https://blocksize.info/
- type: APIReference
  url: https://mcp.blocksize.info/docs
- type: GettingStarted
  url: https://blocksize.info/pricing/
- type: Blog
  url: https://blocksize.info/blog/
- type: Pricing
  url: https://blocksize.info/pricing/
apis:
- name: Blocksize Market Data API
  description: Institutional-grade real-time market data gateway for autonomous AI agents.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  aid: blocksize-info:blocksize-market-data-api
- aid: blocksize-info:blocksize-info-account-plans-api
  name: Blocksize Account Plans API
  description: The Account Plans API from Blocksize — 2 operation(s) for account plans.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Account Plans
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-account-plans-api-openapi.yml
- aid: blocksize-info:blocksize-info-batch-api
  name: Blocksize Batch API
  description: The Batch API from Blocksize — 1 operation(s) for batch.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Batch
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-batch-api-openapi.yml
- aid: blocksize-info:blocksize-info-bidask-api
  name: Blocksize Bidask API
  description: The Bidask API from Blocksize — 1 operation(s) for bidask.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Bidask
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-bidask-api-openapi.yml
- aid: blocksize-info:blocksize-info-briefs-api
  name: Blocksize Briefs API
  description: The Briefs API from Blocksize — 1 operation(s) for briefs.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Briefs
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-briefs-api-openapi.yml
- aid: blocksize-info:blocksize-info-cache-api
  name: Blocksize Cache API
  description: The Cache API from Blocksize — 1 operation(s) for cache.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Cache
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-cache-api-openapi.yml
- aid: blocksize-info:blocksize-info-capabilities-api
  name: Blocksize Capabilities API
  description: The Capabilities API from Blocksize — 1 operation(s) for capabilities.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Capabilities
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-capabilities-api-openapi.yml
- aid: blocksize-info:blocksize-info-checks-api
  name: Blocksize Checks API
  description: The Checks API from Blocksize — 1 operation(s) for checks.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Checks
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-checks-api-openapi.yml
- aid: blocksize-info:blocksize-info-coverage-api
  name: Blocksize Coverage API
  description: The Coverage API from Blocksize — 1 operation(s) for coverage.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Coverage
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-coverage-api-openapi.yml
- aid: blocksize-info:blocksize-info-fx-api
  name: Blocksize Fx API
  description: The Fx API from Blocksize — 1 operation(s) for fx.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Foreign Exchange
  tags_raw:
  - Fx
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-fx-api-openapi.yml
- aid: blocksize-info:blocksize-info-health-api
  name: Blocksize Health API
  description: The Health API from Blocksize — 1 operation(s) for health.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-health-api-openapi.yml
- aid: blocksize-info:blocksize-info-indicators-api
  name: Blocksize Indicators API
  description: The Indicators API from Blocksize — 2 operation(s) for indicators.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Indicators
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-indicators-api-openapi.yml
- aid: blocksize-info:blocksize-info-instruments-api
  name: Blocksize Instruments API
  description: The Instruments API from Blocksize — 1 operation(s) for instruments.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Instruments
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-instruments-api-openapi.yml
- aid: blocksize-info:blocksize-info-mcp-api
  name: Blocksize MCP API
  description: The Mcp API from Blocksize — 1 operation(s) for mcp.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - MCP
  tags_raw:
  - Mcp
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-mcp-api-openapi.yml
- aid: blocksize-info:blocksize-info-metal-api
  name: Blocksize Metal API
  description: The Metal API from Blocksize — 1 operation(s) for metal.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Metals
  tags_raw:
  - Metal
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-metal-api-openapi.yml
- aid: blocksize-info:blocksize-info-monitors-api
  name: Blocksize Monitors API
  description: The Monitors API from Blocksize — 2 operation(s) for monitors.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Monitors
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-monitors-api-openapi.yml
- aid: blocksize-info:blocksize-info-previews-api
  name: Blocksize Previews API
  description: The Previews API from Blocksize — 1 operation(s) for previews.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Previews
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-previews-api-openapi.yml
- aid: blocksize-info:blocksize-info-products-api
  name: Blocksize Products API
  description: The Products API from Blocksize — 1 operation(s) for products.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Product
  tags_raw:
  - Products
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-products-api-openapi.yml
- aid: blocksize-info:blocksize-info-provenance-api
  name: Blocksize Provenance API
  description: The Provenance API from Blocksize — 1 operation(s) for provenance.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Provenance
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-provenance-api-openapi.yml
- aid: blocksize-info:blocksize-info-receipts-api
  name: Blocksize Receipts API
  description: The Receipts API from Blocksize — 1 operation(s) for receipts.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Receipts
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-receipts-api-openapi.yml
- aid: blocksize-info:blocksize-info-rwa-api
  name: Blocksize Rwa API
  description: The Rwa API from Blocksize — 42 operation(s) for rwa.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - RWA
  tags_raw:
  - Rwa
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-rwa-api-openapi.yml
- aid: blocksize-info:blocksize-info-samples-api
  name: Blocksize Samples API
  description: The Samples API from Blocksize — 4 operation(s) for samples.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Samples
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-samples-api-openapi.yml
- aid: blocksize-info:blocksize-info-search-api
  name: Blocksize Search API
  description: The Search API from Blocksize — 1 operation(s) for search.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-search-api-openapi.yml
- aid: blocksize-info:blocksize-info-signals-api
  name: Blocksize Signals API
  description: The Signals API from Blocksize — 2 operation(s) for signals.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Signals
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-signals-api-openapi.yml
- aid: blocksize-info:blocksize-info-snapshots-api
  name: Blocksize Snapshots API
  description: The Snapshots API from Blocksize — 1 operation(s) for snapshots.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Snapshots
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-snapshots-api-openapi.yml
- aid: blocksize-info:blocksize-info-state-api
  name: Blocksize State API
  description: The State API from Blocksize — 1 operation(s) for state.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - States
  tags_raw:
  - State
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-state-api-openapi.yml
- aid: blocksize-info:blocksize-info-vwap-api
  name: Blocksize Vwap API
  description: The Vwap API from Blocksize — 1 operation(s) for vwap.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - VWAP
  tags_raw:
  - Vwap
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-vwap-api-openapi.yml
- aid: blocksize-info:blocksize-info-vwap24h-api
  name: Blocksize Vwap24h API
  description: The Vwap24h API from Blocksize — 1 operation(s) for vwap24h.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Vwap24h
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-vwap24h-api-openapi.yml
- aid: blocksize-info:blocksize-info-vwap30m-api
  name: Blocksize Vwap30m API
  description: The Vwap30m API from Blocksize — 1 operation(s) for vwap30m.
  humanURL: https://mcp.blocksize.info/docs
  baseURL: https://mcp.blocksize.info
  tags:
  - Vwap30m
  properties:
  - type: OpenAPI
    url: openapi/blocksize-info-vwap30m-api-openapi.yml
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 30
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Blocksize API — frequently asked questions

Does Blocksize have an API?

Yes. APIs.io lists 29 APIs from Blocksize, including Blocksize Market Data API, Blocksize Account Plans API and Blocksize Batch API, and 26 more.

Is there an OpenAPI specification for the Blocksize API?

Yes. APIs.io indexes 28 OpenAPI specifications for Blocksize, each linked for download from this page.

How much does the Blocksize API cost?

Blocksize publishes its prices; its Developer plan is €49/ month as of 2026-11-02. APIs.io lists 4 pricing plans for Blocksize, with each plan's price, limits and inclusions under Pricing on this page.

Is the Blocksize API ready for AI agents?

Blocksize has a Kin Score of 33.8 out of 100 (thin) and an Agent Readiness score of 51.4 (agent-ready), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider 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 providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/blocksize-info"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/blocksize-info/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/blocksize-info/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

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A second provider on the same verified email joins the account you already have.