Liquid Agent

Liquid Agent is an agent-native money layer on Base: a USDC account for people (yield, payments and stocks from one balance, through the app) and, for AI agents, a permissionless HTTP API at api.liquidagent.ai that mints a self-custodied ERC-4626 vault holding Coinbase's tokenized NVDA, META, AAPL and GOOGL, buys in from $1, sets custom weights, rebalances and exits to USDC or in-kind any block. Reads are free and need no key; every write returns unsigned calldata the agent signs with its own wallet. Three paid surfaces settle per call in USDC over x402 v2: basket rebalancing signals ($0.04), a shareable portfolio page ($0.25) and an ERC-4337 / ERC-7677 gas sponsor (from $0.03) on Base, Polygon and Solana. The contract is a 17-operation OpenAPI 3.1.0 at api.liquidagent.ai/openapi.json, with an A2A agent card, llms.txt, agents.txt, an x402 resource catalog, an ERC-8004 on-chain identity and two provider-authored Agent Skills in the open-source examples repo.

Liquid Agent publishes 1 API contract indexed on the APIs.io network: Liquid Agent API. Tagged areas include Tokenized Stocks, DeFi, Investing, Agentic Commerce, and x402.

Liquid Agent’s developer surface includes pricing and 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

44.0/100 developing ▬ flat Agent 31/100 agent ready Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 published contracts 2 Agent Skills

Tokenized StocksDeFi Investing Agentic Commerce x402 Stablecoins Account Abstraction Gas Sponsorship Base Solana AI Agents Agent-Native A2A Portfolio Management Market Data

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 44.0/100 · developing

Contract Quality 11.6 / 21

Developer Ergonomics 8.1 / 17

Access Clarity 7.2 / 17

Operational Transparency 2.3 / 11

Contract Governance 1.9 / 10

Discoverability 6.2 / 9

Regulatory Posture 3.2 / 15

Agent readiness — 31/100 · 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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 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

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)
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)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
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

5 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 42.1 — up to +11.6 composite points
Contract Quality scores 54.8 — up to +11.3 composite points
Developer Ergonomics scores 47.6 — up to +10.5 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/liquidagent-ai/apis.yml: open an issue on github.com/api-evangelist/liquidagent-ai 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
AI Agents (A2A agent cards)	undeclared	-	1	1
Agent Skills (SKILL.md packages)	undeclared	-	1	1
Stablecoins and Tokenization (stablecoin issuers, tokenized assets)	undeclared	-	1	1
x402 Micropayments & Agentic Pay-per-Call	undeclared	-	1	1

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 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.

x402

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.

Liquid Agent Liquid Agent API

The Liquid Agent API from Liquid Agent — 15 operation(s) for liquid agent.

Agent Skills 2

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

liquid-agent-stocks

AGENT SKILL

liquid-gas-sponsor

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Liquidagent Ai Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Liquidagent Ai Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Liquidagent Ai Finops

FINOPS

OpenAPI Overlays 1

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.

Liquidagent Ai Openapi Overlay

8 actions · documentation · liquidagent-ai-openapi.yml

DERIVED

Security Posture 2

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

Liquidagent Ai Authentication

apiKey/http · 2 schemes

SECURITY

Liquidagent Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Liquidagent Ai Agentic Access

17 operations · 9 acting · 1 human-in-the-loop

17 operations · 9 acting

AGENTIC

Resources

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

WellKnown

LLMsTxt

AgentSkill

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

SourceCode

SourceCode

Packages

Packages

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

Company 2

The organization behind the API

Website

Website

Twitter

Twitter

Other 4

Properties that don't map to a standard resource type

Overlay

Overlay

AgentCard

AgentCard

AgentCard

AgentCard

X-RegulatoryPosture

X-RegulatoryPosture

Source (apis.yml)

aid: liquidagent-ai
name: Liquid Agent
description: 'Liquid Agent is an agent-native money layer on Base: a USDC account for people (yield, payments and stocks from
  one balance, through the app) and, for AI agents, a permissionless HTTP API at api.liquidagent.ai that mints a self-custodied
  ERC-4626 vault holding Coinbase''s tokenized NVDA, META, AAPL and GOOGL, buys in from $1, sets custom weights, rebalances
  and exits to USDC or in-kind any block. Reads are free and need no key; every write returns unsigned calldata the agent
  signs with its own wallet. Three paid surfaces settle per call in USDC over x402 v2: basket rebalancing signals ($0.04),
  a shareable portfolio page ($0.25) and an ERC-4337 / ERC-7677 gas sponsor (from $0.03) on Base, Polygon and Solana. The
  contract is a 17-operation OpenAPI 3.1.0 at api.liquidagent.ai/openapi.json, with an A2A agent card, llms.txt, agents.txt,
  an x402 resource catalog, an ERC-8004 on-chain identity and two provider-authored Agent Skills in the open-source examples
  repo.'
url: https://raw.githubusercontent.com/api-evangelist/liquidagent-ai/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - liquidagent/liquidagentx402
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
image: https://liquidagent.ai/icon.png
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-19 (local-v3; was a2a-registry harvest stub)
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Tokenized Stocks
- DeFi
- Investing
- Agentic Commerce
- x402
- Stablecoins
- Account Abstraction
- Gas Sponsorship
- Base
- Solana
- AI Agents
- Agent-Native
- A2A
- Portfolio Management
- Market Data
tags_raw:
- Tokenized Stocks
- DeFi
- Investing
- Agentic Commerce
- x402
- Stablecoins
- Account Abstraction
- Gas Sponsorship
- Base
- Solana
- AI Agents
- agent-native
- A2A
- Portfolio Management
- Market Data
- Portfolio-Management
apis:
- aid: liquidagent-ai:liquidagent-ai-liquid-agent-api
  name: Liquid Agent Liquid Agent API
  description: The Liquid Agent API from Liquid Agent — 15 operation(s) for liquid agent.
  humanURL: https://api.liquidagent.ai/v1/guide
  baseURL: https://api.liquidagent.ai
  tags:
  - Liquid Agent
  properties:
  - type: OpenAPI
    url: openapi/liquidagent-ai-liquid-agent-api-openapi.yml
  - type: Documentation
    url: https://api.liquidagent.ai/v1/guide
  - type: APIReference
    url: https://api.liquidagent.ai/openapi.json
  - type: GettingStarted
    url: https://github.com/LiquidAgent/liquidagentx402#readme
  - type: Examples
    url: https://github.com/LiquidAgent/liquidagentx402/tree/main/examples
  - type: LLMsTxt
    url: llms/liquidagent-ai-llms.txt
  - type: LLMsTxt
    url: https://api.liquidagent.ai/llms.txt
  - type: Authentication
    url: authentication/liquidagent-ai-authentication.yml
  - type: Conventions
    url: conventions/liquidagent-ai-conventions.yml
  - type: ErrorCatalog
    url: errors/liquidagent-ai-problem-types.yml
  - type: DataModel
    url: data-model/liquidagent-ai-data-model.yml
  - type: Plans
    url: plans/liquidagent-ai-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/liquidagent-ai-rate-limits.yml
  - type: Conformance
    url: conformance/liquidagent-ai-conformance.yml
  - type: Lifecycle
    url: lifecycle/liquidagent-ai-lifecycle.yml
  - type: AgenticAccess
    url: agentic-access/liquidagent-ai-agentic-access.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/liquidagent-ai-rate-limits.yml
- type: Overlay
  url: overlays/liquidagent-ai-openapi-overlay.yaml
- type: AgentSkill
  url: skills/liquidagent-ai-liquid-agent-stocks.md
- type: AgentSkill
  url: skills/liquidagent-ai-liquid-gas-sponsor.md
- type: Website
  url: https://liquidagent.ai/
- type: GitHubOrganization
  url: https://github.com/LiquidAgent
- type: SourceCode
  name: liquidagentx402 (open-source examples, OpenAPI, llms.txt and Agent Skills, MIT)
  url: https://github.com/LiquidAgent/liquidagentx402
- type: Twitter
  name: X @LiquidAgentAI (declared on the GitHub organization profile)
  url: https://x.com/LiquidAgentAI
- type: StatusPage
  name: Self-measured status (uptime, schema validity, latency; JSON)
  url: https://api.liquidagent.ai/v1/status
- type: Pricing
  name: x402 resource catalog (machine-readable per-call prices)
  url: https://api.liquidagent.ai/.well-known/x402-resources
- type: Plans
  url: plans/liquidagent-ai-plans-pricing.yml
- type: AgentCard
  url: a2a/liquidagent-ai-a2a.yml
- type: AgentCard
  name: A2A agent card (provider-hosted)
  url: https://api.liquidagent.ai/.well-known/agent-card.json
- type: WellKnown
  url: well-known/liquidagent-ai-well-known.yml
- type: LLMsTxt
  url: llms/liquidagent-ai-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Packages
  url: packages/liquidagent-ai-packages.yml
- type: DomainSecurity
  url: security/liquidagent-ai-domain-security.yml
- type: X-RegulatoryPosture
  url: regulatory/liquidagent-ai-regulatory-posture.yml
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 28
  pass: local-v3
x-x402:
  verified: true
  probed: '2026-09-24'
  url: https://api.liquidagent.ai/v1/gas
  evidence:
  - header:payment-required
  - header:x-payment-required
  - body:x402Version
  - body:accepts[scheme,payTo,asset]
  control: 404

Liquid Agent API — frequently asked questions

Does Liquid Agent have an API?

Yes. APIs.io lists 1 API from Liquid Agent, including Liquid Agent Liquid Agent API.

Is there an OpenAPI specification for the Liquid Agent API?

Yes. APIs.io indexes 1 OpenAPI specification for Liquid Agent, each linked for download from this page.

How do I authenticate with the Liquid Agent API?

Liquid Agent uses bearer-token authentication (apiKey/http · 2 schemes). The details are profiled on APIs.io as Liquidagent Ai Authentication.

How much does the Liquid Agent API cost?

APIs.io lists 4 pricing plans for Liquid Agent, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Liquid Agent API ready for AI agents?

Liquid Agent has a Kin Score of 44.0 out of 100 (developing) and an Agent Readiness score of 30.5 (agent-ready), scored by API Evangelist on 2026-10-31.

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