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 📡 Source on GitHub
43.8/100 developing ▬ flat Agent 29/100 agent ready Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
4 published contracts
Tokenized StocksDeFiInvestingAgentic Commercex402StablecoinsAccount AbstractionGas SponsorshipBaseSolanaAI AgentsAgent-NativeA2APortfolio ManagementMarket Data

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Composite quality — 43.8/100 · developing
Contract Quality 10.3 / 19
Developer Ergonomics 7.1 / 15
Access Clarity 6.3 / 15
Operational Transparency 2.1 / 10
Contract Governance 1.6 / 9
Discoverability 5.9 / 8
Regulatory Posture 3.2 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 29/100 · 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
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 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/liquidagent-ai: 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 →

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.

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

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

GENERATED

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
 AgentSkill
AgentSkill
 WellKnown
WellKnown
 LLMsTxt
LLMsTxt
 AgentSkill
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)

apis.yml Raw ↑ 
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

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/liquidagent-ai"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/liquidagent-ai/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/liquidagent-ai/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

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