Do I have to subscribe to call Hermes Plant?

No. Every endpoint is callable pay-as-you-go over x402 with USDC on Base. The Agent Ops plan is for teams who want included monthly credit, priority queue, longer evidence retention, and direct support.

How does pay-as-you-go billing work?

Your agent calls a Hermes Plant endpoint. The first request returns HTTP 402 with the price, network, and payTo. The agent signs a USDC payment, retries, and receives the deterministic result. There is no monthly minimum and no API key.

What's included in Agent Ops at $99/month?

Fifty dollars of included pay-per-call credit each month, 180-day audit log retention (vs 30-day default), priority queue access, Evidence-Verify included on every settled call, and direct email support from the founder.

Do you offer annual pricing?

Yes. Agent Ops annual is $990/yr — two months free vs paying monthly. Enterprise plans are quoted annually with custom terms.

What if a call returns a non-deterministic result?

We refund any settled call whose inputs do not reproduce the same output under the documented schema. Determinism is the product — if we fail it, the payment comes back.

Are there volume discounts?

Yes. Talk to us about Enterprise — committed monthly minimums in exchange for per-call discounts, dedicated facilitator capacity, and an SLA with credits.

Pricing for AI agents

Pay per call. Or anchor a monthly plan.

Every Hermes Plant endpoint is callable pay-as-you-go over x402 — from $0.02 to $2.00 per call, settled in USDC on Base. Teams running production agents anchor an Agent Ops plan for included credit, longer evidence retention, and priority support.

Plan 1 · Already live

Pay-as-you-go

The default. Your agent calls an endpoint, signs an x402 payment in USDC, and gets a deterministic result with evidence. No account. No key. No commitment.

$0.02/ call

Endpoint prices range $0.02 — $2.00.

● No API key, no signup
● Pay USDC on Base via x402 facilitator
● Deterministic result + evidence per call
● Discoverable via OpenAPI, llms.txt, x402 manifest, MCP card
● 30-day audit log retention

Start a paid call Read API docs

Plan 2 · Anchor SKU

Most teams

Agent Ops

For teams running agents that matter. Bundle monthly credit, longer evidence retention, priority queue, and direct support — recurring, predictable, easy to budget.

$99/ month

Or $990/yr — two months free.

● $50 of pay-per-call credit included each month
● 180-day audit log retention (vs 30-day default)
● Evidence-Verify included on every settled call
● Priority queue access on flagship endpoints
● Direct email support from the founder
● Cancel anytime, prorated

Reserve Agent Ops Talk it through first

Plan 3 · Contracted

Enterprise

Committed minimum monthly volume in exchange for per-call discounts, an SLA with credits, dedicated facilitator capacity, and invoiced billing.

Custom

Annual commit, paid by ACH, wire, or USDC.

● Custom committed monthly minimum + per-call discount
● Production SLA with service credits
● Dedicated x402 facilitator capacity
● Security review, SOC2 documentation on request
● Invoiced billing (ACH / wire / USDC) and PO support
● Direct line to engineering for net-new calculators

Talk to the founder Email directly

Endpoint price ladder

The full per-call price list

Every endpoint is callable today. DealAnalyzer is the flagship — full deal underwriting in a single call.

Risk reversal

Refund any non-deterministic call.

Determinism is the product. If a settled call's documented inputs do not reproduce the same output, we refund the payment.

First $1 of calls free.

The first 100 verified agents get a $1 credit grant — wire your agent against a real endpoint before committing.

Claim the $1 credit

Compare plans

Side-by-side feature comparison.

Browse endpoints →

Feature	Pay-as-you-go	Agent Ops	Enterprise
Per-call payment	●	●	●
No API key required	●	●	●
Deterministic result + evidence	●	●	●
Audit log retention	30 days	180 days	Custom
Included monthly credit	—	$50	Custom minimum
Evidence-Verify on every call	Pay per use	Included	Included
Priority queue	—	●	●
Email support from founder	—	●	●
SLA with credits	—	—	●
Dedicated facilitator capacity	—	—	●
Invoice & ACH / wire payment	—	—	●

Who buys this

Built for production agents that move money or model deals.

Hermes Plant is wired into agents shipping inside real fintech, PE, and crypto operations. If your agent freelances finance math, you are one wrong IRR away from a bad day.

PE diligence agents
Treasury & cash-management bots
Credit & loan underwriting agents
Crypto fund risk dashboards
Sell-side research agents
M&A modeling agents

Frameworks we play nice with

LangChain. CrewAI. AutoGen. MCP. OpenAI Agents SDK.

Endpoints are plain HTTP with an x402 challenge — any agent framework that can sign a USDC payment and retry a request can call them. We publish llms.txt, an OpenAPI spec, and an MCP server card so your agent discovers the right endpoint without you wiring config.

LangChainCrewAIAutoGenMCPOpenAI Agents SDKx402 facilitatorUSDC on Base

Pricing FAQ

Questions agents and finance teams ask first.

Do I have to subscribe to call Hermes Plant?: No. Every endpoint is callable pay-as-you-go over x402 with USDC on Base. The Agent Ops plan is for teams who want included monthly credit, priority queue, longer evidence retention, and direct support.
How does pay-as-you-go billing work?: Your agent calls a Hermes Plant endpoint. The first request returns HTTP 402 with the price, network, and payTo. The agent signs a USDC payment, retries, and receives the deterministic result. There is no monthly minimum and no API key.
What's included in Agent Ops at $99/month?: Fifty dollars of included pay-per-call credit each month, 180-day audit log retention (vs 30-day default), priority queue access, Evidence-Verify included on every settled call, and direct email support from the founder.
Do you offer annual pricing?: Yes. Agent Ops annual is $990/yr — two months free vs paying monthly. Enterprise plans are quoted annually with custom terms.
What if a call returns a non-deterministic result?: We refund any settled call whose inputs do not reproduce the same output under the documented schema. Determinism is the product — if we fail it, the payment comes back.
Are there volume discounts?: Yes. Talk to us about Enterprise — committed monthly minimums in exchange for per-call discounts, dedicated facilitator capacity, and an SLA with credits.

Start the first deterministic call

Wire one endpoint into your agent. See the evidence. Decide on a plan.

Pay-as-you-go is live. Reserve Agent Ops to lock in the $50-included monthly credit at the founding-customer rate. Or talk Enterprise if you need an SLA.

Browse endpoints Reserve Agent Ops Enterprise quote