●

Crier

AI PAYMENT-READY

payment-ready until 2026-10-06

Outbound messaging for AI agents, paid per message. POST /v1/email ($0.01) relays an email to a person from a fixed verified sender, with a footer naming the relay, List-Unsubscribe headers, and a working unsubscribe page. POST /v1/webhook ($0.005) delivers an HMAC signed POST to a receiver you name, retried on a 30s to 6h ladder, with 4xx treated as permanent. Both return 202 with a delivery id you can poll or cancel, and nothing is sent until the payment settles. Addresses that bounce, complain, or unsubscribe are refused to every future sender, and per destination rate caps are enforced before payment rather than after it. Operated by Vima Brosta LLC.

Pay from $0.005 to $0.01 per request in USDC on Base / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

measured since 2026-09-15 (start of our harvest window) · $0.29 all-time · settled via coinbase

BASE URL https://crier.vimabrosta.com │ WEBSITE https://crier.vimabrosta.com │ ENDPOINTS 2 │ NETWORK Base / Solana │ ASSET USDC │ MEMBER SINCE 2026-09-21 │ MONITORED SINCE 2026-09-21

VERDICT

ranking generation 3

solid 85/100 #45 of 162 in AI by measured score

What the score read on this service: status online, 96.2% uptime 30d, 1028ms response p95, x402 compliance 14 of 14, $0.005 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

It is a score inside AI, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 162 listings, this one among them. That set is wider than the 162 the position above is counted against, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

ALTERNATIVES IN AI

Other AI services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
Otto AI	strong	95	100%	$56.13
NetIntel	strong	94	100%	$16.76
x402engine	strong	93	100%	$28.00
GlianaAI	solid	93	100%	$68.10
Agent402.tools	solid	92	99.7%	$138.77

5 of 161 other ranked services in AI · see the whole category

ASSESSMENT

updated 5m ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 96.2%

uptime · latest daily rollup: 100%
uptime 7d: 100%
uptime 30d: 96.2%
uptime 90d: 96.2%
response p95: 1028ms
avg response: 1151ms
total checks: 694

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.005 to $0.01 (p32 in AI)

price (min): $0.005
price (max): $0.01
category percentile (min): p32 in AI
category percentile (max): p23 in AI
endpoints / prices: 2 / 2
model: tiered
stability: 100%

risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age: -
registrar: -
hosting: custom
domain created: ---

Identity facts, not a risk score.

traction $0.285 30d · 4 buyers

volume 30d: $0.285
buyers 30d: 4
settlements 30d: 25
measured since: 2026-09-15 (start of our harvest window)
last settlement: 2026-09-28
top buyer share: 53% of 30d volume (address, not entity)
trend 7d vs 30d: 3.31x the 30d daily rate
networks: eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time: $0.29
settlements all-time: 25
median settlement 30d: $0.01
max settlement 30d: $0.05
settled via: coinbase ($0.28, 25 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is part of the ranking score: a higher share lowers the traction part of the score, by up to half when one address holds all 30d volume.

CHANGES

10 in 30d

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes price changed 10h ago (10 in 30d)

price changed · 10h ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83375 → 84750

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 41688 → 42375

price changed · 6d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86222 → 86292

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43277 → 43146

price changed · 7d ago

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43111 → 43277

price changed · 7d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 87305 → 86222

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43492 → 43111

price changed · 7d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86983 → 87305

price changed · 7d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85134 → 86983

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42567 → 43492

price changed · 7d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86682 → 85134

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43341 → 42567

price changed · 7d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85741 → 86682

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42871 → 43341

price changed · 8d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86054 → 85741

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43027 → 42871

price changed · 8d ago

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 87256 → 86054

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43628 → 43027

Amounts are on-wire atomic units in the named asset.

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	DESCRIPTION	PRICE	NETWORK	ASSET	402 CHANNEL
GET	/v1/email		$0.01	Base/Solana	USDC	header
GET	/v1/webhook		$0.005	Base/Solana	USDC	header

2 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /v1/email returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://crier.vimabrosta.com/v1/email'

// 402 response (captured by monitor) · 2 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x835323C73DD9cF4D0D23054d1ee7C11CFea34d4A",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
        "amount": "10000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
        "amount": "86428",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://crier.vimabrosta.com/v1/email",
      "mimeType": "application/json",
      "description": "Send an email from an AI agent to a person: subject, plain text (HTML optional), an optional reply-to. Delivered from a fixed relay address with a footer naming the relay and an unsubscribe link, retried on failure, with a status endpoint you can poll. Addresses that bounce, complain, or unsubscribe are refused to every future sender. Up to 4 per hour and 12 per day to one address. One-time $0.01, no account needed."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x835323C73DD9cF4D0D23054d1ee7C11CFea34d4A",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
        "amount": "5000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      },
      {
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
        "amount": "43214",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://crier.vimabrosta.com/v1/webhook",
      "mimeType": "application/json",
      "description": "Deliver a signed webhook from an AI agent to a public URL: JSON or text body up to 16KB, POST or PUT, optional custom X- headers. Retried at 30 s, 2 m, 10 m, 1 h, and 6 h after your session is gone, HMAC signed with a one-time secret so the receiver can verify it, with a status endpoint you can poll. One-time $0.005, no account needed."
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 7d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/crier/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

7D UPTIME 100%

RESPONSE TIME

AVG RESP 1151ms

PRICE (captured 402, USD)

Median across 2 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

price percentile in AI

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-09-29 · last up 2026-09-29

402 payload captured
accepts[] array present
payTo address recoverable
payTo at accepts[0].payTo (conformant shape)
payTo is a valid on-chain address
atomic price declared
atomic price in a sane range
asset (token) address declared
network resolves to CAIP-2
payment scheme declared
served over HTTPS
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (18) live · click to expand

TIME STATUS RESP CAUSE

04:06:01 UTC ● OK 686ms

03:50:00 UTC ● OK 220ms

03:34:00 UTC ● OK 421ms

03:18:00 UTC ● OK 341ms

03:02:00 UTC ● OK 402ms

02:46:03 UTC ● OK 1063ms

02:30:02 UTC ● OK 695ms

02:14:02 UTC ● OK 587ms

01:58:03 UTC ● OK 952ms

01:42:02 UTC ● OK 870ms

01:26:03 UTC ● OK 1088ms

01:10:02 UTC ● OK 815ms

00:54:02 UTC ● OK 761ms

00:38:02 UTC ● OK 1019ms

00:22:01 UTC ● OK 821ms

00:06:01 UTC ● OK 547ms

23:50:00 UTC ● OK 250ms

23:34:00 UTC ● OK 293ms

EMBED THIS BADGE

Show that Crier is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

status

// HTML

<a href="https://x402-list.com/services/crier?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/crier.svg" alt="Crier listed on x402-list" height="28">
</a>

// Markdown

[![Crier on x402-list](https://x402-list.com/badge/crier.svg)](https://x402-list.com/services/crier?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/crier?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/crier.svg?data=uptime" alt="Crier uptime on x402-list" height="28">
</a>

RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/crier/update.